What years did Julio Mateo play?

Julio Mateo played in Major League Baseball from 2002 to 2007.

Was Julio Mateo a pitcher?

Yes. Julio Mateo pitched in the major leagues, recording 18 wins and 216 strikeouts.

What was Julio Mateo's career ERA?

Julio Mateo finished with a 3.68 career ERA, going 18-12 with 216 strikeouts.

How many strikeouts did Julio Mateo have?

Julio Mateo recorded 216 career strikeouts.

Is Julio Mateo in the Hall of Fame?

No. Julio Mateo has not been inducted into the National Baseball Hall of Fame.

What teams did Julio Mateo play for?

Julio Mateo played for the Seattle Mariners.

Julio Mateo

Pitcher · Career Stats, Bio & Records (2002-2007)

Julio Mateo was a pitcher who played in Major League Baseball from 2002 to 2007 for the Seattle Mariners, a span of 6 seasons. Across 219 career appearances, he went 18-12 with a 3.68 ERA and 216 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 12, 2026

W–L 18–12

ERA 3.68

WHIP 1.20

SO 216

Pitcher PIV -1074.3

Position: Pitcher
Bats / Throws: R / R
Height / Weight: 5'11" / 235 lb
Born: 8/2/1977 in Bani, Peravia, D.R.
MLB Debut: 2002-05-07
Last Game: 2007-05-03

Full name: Julio Cesar Mateo

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Career Pitching Statistics

Julio Mateo — Career Pitching Statistics
W	L	G	GS	CG	SHO	SV	IP	H	ER	HR	BB	SO	ERA	Pitcher PIV
18	12	219	1	0	0	2	318.1	298	130	45	85	216	3.68	-1074.3

Career ERA 3.68 vs. league average 4.41 across their career seasons — 16.6% better than league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Julio Mateo — Season-by-Season Pitching
Year	Team	Lg	W	L	G	GS	SV	IP	H	ER	BB	SO	ERA	Lg ERA	Pitcher PIV
2002	SEA	AL	0	0	12	0	0	21.0	20	10	12	15	4.29	4.28 (avg)	-184.1
2003	SEA	AL	4	0	50	0	1	85.2	69	30	13	71	3.15	4.40 (+28%)	590.4
2004	SEA	AL	1	2	45	0	1	57.2	56	30	16	43	4.68	4.46 (-5%)	-959.5
2005	SEA	AL	3	6	55	1	0	88.1	79	30	17	52	3.06	4.29 (+29%)	-293.4
2006	SEA	AL	9	4	48	0	0	53.2	62	25	22	31	4.19	4.53 (+7%)	-423.4
2007	SEA	AL	1	0	9	0	0	12.0	12	5	5	4	3.75	4.47 (+16%)	195.5
Career · 6 seasons			18	12	219	1	2	318.1	298	130	85	216	3.68	—	-1,074

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

Julio Mateo — Career Batting Statistics
G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS	PIV
219	0	0	0	0	0	0	0	0	0	0	.000	.000	.000	.000	0

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Julio Mateo — Season-by-Season Batting
Year	Team	Lg	G	AVG	Lg AVG	Lg OBP	Lg SLG	Lg OPS	PIV
2002	SEA	AL	12	.000	—	—	—	—	0.0
2003	SEA	AL	50	.000	—	—	—	—	0.0
2004	SEA	AL	45	.000	—	—	—	—	0.0
2005	SEA	AL	55	.000	—	—	—	—	0.0
2006	SEA	AL	48	.000	—	—	—	—	0.0
2007	SEA	AL	9	.000	—	—	—	—	0.0
Career · 6 seasons			219	—	—	—	—	—	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 (438 games) →

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

Batting — Home / Away

Julio Mateo — Batting — Home / Away
Split	G	AB	R	H	HR	RBI	AVG
Home	108	0	0	0	0	0	—
Away	111	0	0	0	0	0	—

Pitching — Home / Away

Julio Mateo — Pitching — Home / Away
Split	G	IP	H	ER	BB	SO	ERA
Home	108	173.2	164	79	47	125	4.09
Away	111	144.2	134	51	38	91	3.17

Last 10 Games — Pitching

Julio Mateo — Last 10 Games — Pitching
Date	Tm	Opp	Dec	IP	H	R	ER	BB	SO
2007-05-03	SEA	BOS	—	2.0	1	0	0	1	1
2007-04-28	SEA	KCR	—	2.0	1	0	0	1	0
2007-04-21	SEA	LAA	—	1.0	3	1	1	1	0
2007-04-19	SEA	MIN	—	0.1	2	2	2	1	0
2007-04-18	SEA	MIN	—	1.0	0	0	0	0	0
2007-04-15	SEA	TEX	—	2.0	0	0	0	0	1
2007-04-13	SEA	TEX	—	1.2	1	0	0	1	1
2007-04-10	SEA	BOS	—	1.0	1	0	0	0	1
2007-04-03	SEA	OAK	W	1.0	3	2	2	0	0
2006-08-25	SEA	BOS	—	2.1	1	0	0	0	0

Fielding Statistics

Career Fielding Totals by Position

Julio Mateo — Career Fielding Totals by Position
Position	G	GS	PO	A	E	DP
P	219	1	11	21	6	2

Season-by-Season Fielding

Julio Mateo — Season-by-Season Fielding
Year	Team	Pos	G	GS	PO	A	E	DP
2002	SEA	P	12	0	0	1	0	0
2003	SEA	P	50	0	5	4	2	0
2004	SEA	P	45	0	3	1	3	1
2005	SEA	P	55	1	1	10	0	0
2006	SEA	P	48	0	1	4	1	1
2007	SEA	P	9	0	1	1	0	0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Julio Mateo — Career Games by Position
Position	Games
Pitcher	219

Salary History

Julio Mateo — Salary History
Year	Team	League	Salary
2007	SEA	AL	$1,075,000
2006	SEA	AL	$700,000
2005	SEA	AL	$390,000
2004	SEA	AL	$345,000
2003	SEA	AL	$302,500
Total Career Earnings			$2,812,500

Julio Mateo: the record in brief

May 7, 2002 and May 3, 2007 bracket Julio Mateo's time in the majors: the debut and the last game on record. The team column never changes: it is the Seattle Mariners from 2002 to 2007. The bio lists Mateo as a pitcher who threw and hit right-handed. Height and weight on file: 5-foot-11 and 235 pounds. The birth record reads August 2, 1977, in Bani, Peravia, D.R. The given name on file is Julio Cesar Mateo.

Mateo went 18-12 with a 3.68 ERA in 219 games, 1 of them starts. The totals include 216 strikeouts. The leagues Mateo pitched in allowed 4.41 earned runs per nine over those seasons, so the career ERA was 16.6% better than average. 2006 brought Mateo a season-high 9 wins. Mateo struck out 71 batters in 2003, a career high. Among the heaviest workloads, the lowest ERA was 3.06 in 2005, when the league's was 4.29.

The position breakdown shows 219 games, all at pitcher. On the mound, the fielding record shows 6 errors alongside 11 putouts and 21 assists.

Mateo's listed earnings total $2,812,500; the highest single salary was $1,075,000, in 2007. The game-log section draws on 438 games of Retrosheet box scores for Mateo.

Frequently Asked Questions about Julio Mateo

What years did Julio Mateo play?: Julio Mateo played in Major League Baseball from 2002 to 2007.
Was Julio Mateo a pitcher?: Yes. Julio Mateo pitched in the major leagues, recording 18 wins and 216 strikeouts.
What was Julio Mateo's career ERA?: Julio Mateo finished with a 3.68 career ERA, going 18-12 with 216 strikeouts.
How many strikeouts did Julio Mateo have?: Julio Mateo recorded 216 career strikeouts.
Is Julio Mateo in the Hall of Fame?: No. Julio Mateo has not been inducted into the National Baseball Hall of Fame.
What teams did Julio Mateo play for?: Julio Mateo played for the Seattle Mariners.