What years did Sean O'Sullivan play?

Sean O'Sullivan played in Major League Baseball from 2009 to 2016.

Was Sean O'Sullivan a pitcher?

Yes. Sean O'Sullivan pitched in the major leagues, recording 13 wins and 158 strikeouts.

How many home runs did Sean O'Sullivan hit?

Sean O'Sullivan hit 0 career home runs with 4 hits.

What teams did Sean O'Sullivan play for?

Sean O'Sullivan played for 5 teams: the Los Angeles Angels of Anaheim (2009–2010), the Kansas City Royals (2010–2011), the San Diego Padres (2013), the Philadelphia Phillies (2014–2015), and the Boston Red Sox (2016).

What were Sean O'Sullivan's career stats?

In 71 games, Sean O'Sullivan went 13-23 with a 6.01 ERA, 158 strikeouts, and 323.2 innings pitched.

What was Sean O'Sullivan's salary?

Sean O'Sullivan's recorded salary was $420,500 in 2011.

What position did Sean O'Sullivan play?

Sean O'Sullivan played primarily as a pitcher, the position where he appeared in the most games.

How tall was Sean O'Sullivan and how much did he weigh?

Sean O'Sullivan was listed at 6 feet 1 inch and 245 pounds.

What was Sean O'Sullivan's career ERA?

Sean O'Sullivan finished with a 6.01 career ERA, going 13-23 with 158 strikeouts.

How many strikeouts did Sean O'Sullivan have?

Sean O'Sullivan recorded 158 career strikeouts.

Is Sean O'Sullivan in the Hall of Fame?

No. Sean O'Sullivan has not been inducted into the National Baseball Hall of Fame.

Sean O'Sullivan

Pitcher · Career Stats, Bio & Records (2009-2016)

Sean O'Sullivan was a pitcher who played in Major League Baseball from 2009 to 2016 for 5 teams, including the Los Angeles Angels of Anaheim, a span of 8 seasons. Across 71 career appearances, he went 13-23 with a 6.01 ERA and 158 strikeouts.

W (Wins):: Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
ERA (Earned Run Average):: Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
SO (Strikeouts):: For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
WHIP (Walks and Hits per Inning Pitched):: Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.

Data updated October 15, 2026

W–L 13–23

ERA 6.01

WHIP 1.58

SO 158

Pitcher PIV -13132.9

Position: Pitcher
Bats / Throws: R / R
Height / Weight: 6'1" / 245 lb
Born: 9/1/1987 in San Diego, CA, USA
MLB Debut: 2009-06-16
Last Game: 2016-07-08

Full name: Sean Daniel O'Sullivan

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Career Pitching Statistics

Sean O'Sullivan — Career Pitching Statistics
W	L	G	GS	CG	SHO	SV	IP	H	ER	HR	BB	SO	ERA	Pitcher PIV
13	23	71	56	0	0	0	323.2	398	216	59	115	158	6.01	-13132.9

Career ERA 6.01 vs. league average 4.01 across their career seasons — 49.6% worse than league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Sean O'Sullivan Stats, Bio & Career Records
Year	Team	Lg	W	L	G	GS	IP	H	ER	BB	SO	ERA	Lg ERA	Pitcher PIV
2009	LAA	AL	4	2	12	10	51.2	60	34	16	29	5.92	4.32 (-37%)	-2143.1
2010	LAA	AL	1	0	5	1	13.0	7	3	4	6	2.08	4.08 (+49%)	0.2
2010	KCA	AL	3	6	14	13	70.2	83	48	27	37	6.11	4.08 (-50%)	-3032.0
2011	KCA	AL	2	6	12	10	58.1	78	47	26	19	7.25	3.94 (-84%)	-3062.7
2013	SDN	NL	0	2	7	3	25.0	31	11	14	12	3.96	3.87 (-2%)	-14.0
2014	PHI	NL	0	1	3	2	12.2	15	9	2	7	6.39	3.74 (-71%)	-582.3
2015	PHI	NL	1	6	13	13	71.0	94	48	20	35	6.08	3.96 (-54%)	-3930.5
2016	BOS	AL	2	0	5	4	21.1	30	16	6	13	6.75	4.19 (-61%)	-368.6
Career · 8 seasons			13	23	71	56	323.2	398	216	115	158	6.01	—	-13,133

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Career Batting Statistics

Sean O'Sullivan — Career Batting Statistics
G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS	PIV
71	33	3	4	2	0	0	0	0	1	17	.121	.147	.182	.329	0

Career AVG .121 vs. league average .256 across their career seasons — 52.6% below league average.

Career OBP .147 vs. league average .321 across their career seasons — 54.2% below league average.

Career SLG .182 vs. league average .403 across their career seasons — 54.9% below league average.

Career OPS .329 vs. league average .725 across their career seasons — 54.6% below league average.

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Sean O'Sullivan — Season-by-Season Batting
Year	Team	Lg	G	AB	R	H	2B	BB	SO	AVG	Lg AVG	Lg OBP	Lg SLG	Lg OPS	PIV
2009	LAA	AL	12	3	1	1	0	0	1	.333	—	—	—	—	0.0
2010	LAA	AL	5	1	0	0	0	0	0	.000	—	—	—	—	0.0
2010	KCA	AL	14	0	0	0	0	0	0	.000	—	—	—	—	0.0
2011	KCA	AL	12	0	0	0	0	0	0	.000	—	—	—	—	0.0
2013	SDN	NL	7	6	0	1	1	0	4	.167	—	—	—	—	0.0
2014	PHI	NL	3	3	0	0	0	0	2	.000	—	—	—	—	0.0
2015	PHI	NL	13	20	2	2	1	1	10	.100	—	—	—	—	0.0
2016	BOS	AL	5	0	0	0	0	0	0	.000	—	—	—	—	0.0
Career · 8 seasons			71	33	3	4	2	1	17	.121	—	—	—	—	0

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Game Log & Splits

View full game log (142 games) →

Per-game data from Retrosheet (regular season, through 2025).

Batting — Home / Away

Sean O'Sullivan — Batting — Home / Away
Split	G	AB	R	H	HR	RBI	AVG
Home	42	16	2	2	0	0	.125
Away	29	17	1	2	0	0	.118

Pitching — Home / Away

Sean O'Sullivan — Pitching — Home / Away
Split	G	IP	H	ER	BB	SO	ERA
Home	42	185.0	216	110	71	90	5.35
Away	29	138.2	182	106	44	68	6.88

Last 10 Games — Batting

Sean O'Sullivan — Last 10 Games — Batting
Date	Tm	Opp	Res	AB	R	H	2B	SO
2016-07-08	BOS	TBR	W	0	0	0	0	0
2016-07-03	BOS	LAA	W	0	0	0	0	0
2016-05-15	BOS	HOU	W	0	0	0	0	0
2016-05-10	BOS	OAK	W	0	0	0	0	0
2016-05-07	BOS	NYY	L	0	0	0	0	0
2015-07-06	PHI	LAD	L	3	0	0	0	2
2015-06-29	PHI	MIL	L	2	1	1	1	1
2015-06-23	PHI	NYY	W	0	0	0	0	0
2015-06-18	PHI	BAL	W	0	0	0	0	0
2015-06-13	PHI	PIT	L	2	0	0	0	1

Last 10 Games — Pitching

Sean O'Sullivan — Last 10 Games — Pitching
Date	Tm	Opp	Dec	IP	H	R	ER	BB	SO	HR
2016-07-08	BOS	TBR	—	5.0	7	4	4	1	4	1
2016-07-03	BOS	LAA	W	5.0	4	2	2	3	2	0
2016-05-15	BOS	HOU	—	4.1	5	6	5	2	3	2
2016-05-10	BOS	OAK	W	6.0	12	4	4	0	3	0
2016-05-07	BOS	NYY	—	1.0	2	1	1	0	1	0
2015-07-06	PHI	LAD	—	5.1	8	7	6	2	3	2
2015-06-29	PHI	MIL	L	5.0	12	6	6	1	3	0
2015-06-23	PHI	NYY	—	4.1	10	6	6	0	2	4
2015-06-18	PHI	BAL	—	5.0	4	1	1	2	7	1
2015-06-13	PHI	PIT	L	6.0	8	4	4	4	1	0

Fielding Statistics

Career Fielding Totals by Position

Sean O'Sullivan — Career Fielding Totals by Position
Position	G	GS	PO	A	E	DP
P	71	56	22	31	3	2

Season-by-Season Fielding

Sean O'Sullivan — Season-by-Season Fielding
Year	Team	Pos	G	GS	PO	A	E	DP
2009	LAA	P	12	10	4	3	0	0
2010	LAA	P	5	1	1	1	0	0
2010	KCA	P	14	13	7	6	1	1
2011	KCA	P	12	10	4	7	1	0
2013	SDN	P	7	3	0	4	0	0
2014	PHI	P	3	2	0	2	0	1
2015	PHI	P	13	13	6	6	0	0
2016	BOS	P	5	4	0	2	1	0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Sean O'Sullivan — Career Games by Position
Position	Games
Pitcher	71

Salary History

Sean O'Sullivan's recorded salaries total $420,500 over 1 season, in 2011. This total is partial: the salary data covers 1985 to 2016, and O'Sullivan's career ran from 2009 to 2016. No salary is recorded for 6 of his seasons between 1985 and 2016.

Sean O'Sullivan — Salary History
Year	Team	League	Salary
2011	KCA	AL	$420,500
Total recorded salary (partial)			$420,500

Sean O'Sullivan: the record in brief

According to the bio, Sean O'Sullivan debuted on June 16, 2009 and played a final game on July 8, 2016. The season rows list, in order, the Los Angeles Angels of Anaheim (2009 through 2010), the Kansas City Royals (2010 through 2011), the San Diego Padres (2013), the Philadelphia Phillies (2014 through 2015), and the Boston Red Sox (2016). O'Sullivan played primarily as a pitcher and threw and hit right-handed. The bio adds a birth date on September 1, 1987, in San Diego, CA, USA and a listed size of 6 feet, 1 inch and 245 pounds. The bio lists the given name Sean Daniel.

O'Sullivan's career pitching line is 13 wins, 23 losses and a 6.01 ERA over 71 appearances. Also on O'Sullivan's record: 158 strikeouts. The league ERA over O'Sullivan's seasons was 4.01, so the 6.01 figure ran 49.6% worse than average. In 2009, one of the busiest seasons, O'Sullivan posted a 5.92 ERA; the league figure that year was 4.32.

Frequently Asked Questions about Sean O'Sullivan

What years did Sean O'Sullivan play?: Sean O'Sullivan played in Major League Baseball from 2009 to 2016.
Was Sean O'Sullivan a pitcher?: Yes. Sean O'Sullivan pitched in the major leagues, recording 13 wins and 158 strikeouts.
How many home runs did Sean O'Sullivan hit?: Sean O'Sullivan hit 0 career home runs with 4 hits.
What teams did Sean O'Sullivan play for?: Sean O'Sullivan played for 5 teams: the Los Angeles Angels of Anaheim (2009–2010), the Kansas City Royals (2010–2011), the San Diego Padres (2013), the Philadelphia Phillies (2014–2015), and the Boston Red Sox (2016).
What were Sean O'Sullivan's career stats?: In 71 games, Sean O'Sullivan went 13-23 with a 6.01 ERA, 158 strikeouts, and 323.2 innings pitched.
How much did Sean O'Sullivan earn in his career?: Sean O'Sullivan's recorded salaries total $420,500 over 1 season, in 2011. This total is partial: the salary data covers 1985 to 2016, and O'Sullivan's career ran from 2009 to 2016. No salary is recorded for 6 of his seasons between 1985 and 2016.
What was Sean O'Sullivan's salary?: Sean O'Sullivan's recorded salary was $420,500 in 2011.
What position did Sean O'Sullivan play?: Sean O'Sullivan played primarily as a pitcher, the position where he appeared in the most games.
How tall was Sean O'Sullivan and how much did he weigh?: Sean O'Sullivan was listed at 6 feet 1 inch and 245 pounds.
What was Sean O'Sullivan's career ERA?: Sean O'Sullivan finished with a 6.01 career ERA, going 13-23 with 158 strikeouts.
How many strikeouts did Sean O'Sullivan have?: Sean O'Sullivan recorded 158 career strikeouts.
Is Sean O'Sullivan in the Hall of Fame?: No. Sean O'Sullivan has not been inducted into the National Baseball Hall of Fame.