Leo Rosales

Pitcher · Career Stats, Bio & Records (2008-2010)

Leo Rosales was a pitcher who played in Major League Baseball from 2008 to 2010 for the Arizona Diamondbacks, a span of 3 seasons. Across 76 career appearances, he went 5-2 with a 5.01 ERA and 61 strikeouts. His career Pitcher PIV — Baseball Data Hub's era-adjusted measure of pitching impact — is 44.3.

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

W–L 5–2
ERA 5.01
WHIP 1.45
SO 61
Pitcher PIV 44.3
Position
Pitcher
Bats / Throws
R / R
Height / Weight
6'0" / 205 lb
Born
5/28/1981 in Los Angeles, CA, USA
MLB Debut
2008-06-15
Last Game
2010-10-03

Full name: Leonel Rosales

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Career Pitching Statistics

Leo Rosales — Career Pitching Statistics
W L G GS CG SHO SV IP H ER HR BB SO ERA Pitcher PIV
5 2 76 0 0 0 0 91.7 97 51 9 36 61 5.01 44.3

Career ERA 5.01 vs. league average 4.24 across their career seasons — 18.0% worse than league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Leo Rosales — Season-by-Season Pitching
Year Team Lg W L G GS CG SHO SV IP H ER BB SO ERA Lg ERA Pitcher PIV
2008 ARI NL 1 1 27 0 0 0 0 30.0 32 14 15 18 4.20 4.32 (+3%) -56.2
2009 ARI NL 2 1 33 0 0 0 0 45.3 40 24 12 31 4.76 4.32 (-10%) 416.8
2010 ARI NL 2 0 16 0 0 0 0 16.3 25 13 9 12 7.16 4.08 (-76%) -316.4
Career · 3 seasons 5 2 76 0 0 0 0 91.2 97 51 36 61 5.01 — 44

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

Leo Rosales — Career Batting Statistics
G AB R H 2B 3B HR RBI SB BB SO AVG OBP SLG OPS PIV
76 5 0 0 0 0 0 0 0 0 2 .000 .000 .000 .000 0

Career AVG .000 vs. league average .261 across their career seasons — 100.0% below league average.

Career OBP .000 vs. league average .331 across their career seasons — 100.0% below league average.

Career SLG .000 vs. league average .412 across their career seasons — 100.0% below league average.

Career OPS .000 vs. league average .743 across their career seasons — 100.0% below league average.

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Leo Rosales — Season-by-Season Batting
Year Team Lg G AB R H 2B 3B HR RBI SB BB SO AVG Lg AVG Lg OBP Lg SLG Lg OPS PIV
2008 ARI NL 27 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2009 ARI NL 33 3 0 0 0 0 0 0 0 0 2 .000 — — — — 0.0
2010 ARI NL 16 2 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
Career · 3 seasons 76 5 0 0 0 0 0 0 0 0 2 .000 — — — — 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 (152 games) →

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

Batting — Home / Away

Leo Rosales — Batting — Home / Away
SplitGABRHHRRBIAVG
Home3620000.000
Away4030000.000

Pitching — Home / Away

Leo Rosales — Pitching — Home / Away
SplitGIPHERBBSOERA
Home3640.2422016274.43
Away4051.0553120345.47

Last 10 Games — Batting

Leo Rosales — Last 10 Games — Batting
DateTmOppResABRH2B3BHRRBIBBSO
2010-10-03 AZLADL 000000000
2010-09-30 AZSFGL 000000000
2010-09-26 AZLADW 000000000
2010-09-18 AZPITL 000000000
2010-09-13 AZCINL 000000000
2010-09-07 AZSFGL 000000000
2010-09-04 AZHOUL 000000000
2010-04-28 AZCOLW 100000000
2010-04-25 AZPHIW 000000000
2010-04-23 AZPHIW 000000000

Last 10 Games — Pitching

Leo Rosales — Last 10 Games — Pitching
DateTmOppDecIPHRERBBSOHR
2010-10-03 AZLAD — 0.1211100
2010-09-30 AZSFG — 1.0100000
2010-09-26 AZLAD — 1.0200010
2010-09-18 AZPIT — 1.0322010
2010-09-13 AZCIN — 2.0111111
2010-09-07 AZSFG — 0.1000000
2010-09-04 AZHOU — 0.2100100
2010-04-28 AZCOL — 1.1677211
2010-04-25 AZPHI W 1.0200000
2010-04-23 AZPHI — 1.0000010

Fielding Statistics

Career Fielding Totals by Position

Leo Rosales — Career Fielding Totals by Position
Position G GS PO A E DP
P 76 0 7 8 2 0

Season-by-Season Fielding

Leo Rosales — Season-by-Season Fielding
Year Team Pos G GS PO A E DP
2008 ARI P 27 0 1 3 1 0
2009 ARI P 33 0 4 5 1 0
2010 ARI P 16 0 2 0 0 0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Leo Rosales — Career Games by Position
Position Games
Pitcher 76

Salary History

Leo Rosales — Salary History
Year Team League Salary
2010 ARI NL $409,500
Total Career Earnings $409,500

College History

Leo Rosales — College History
School Name City State Years Attended
California State University Northridge Los Angeles CA 2000, 2001, 2002, 2003

Frequently Asked Questions about Leo Rosales

What years did Leo Rosales play?
Leo Rosales played in Major League Baseball from 2008 to 2010.
Was Leo Rosales a pitcher?
Yes. Leo Rosales pitched in the major leagues, recording 5 wins and 61 strikeouts.
How many home runs did Leo Rosales hit?
Leo Rosales hit 0 career home runs.
What was Leo Rosales's career batting average?
Leo Rosales batted .000 over his career, with 0 hits in 5 at bats.
What was Leo Rosales's career ERA?
Leo Rosales finished with a 5.01 career ERA, going 5-2 with 61 strikeouts.
How many strikeouts did Leo Rosales have?
Leo Rosales recorded 61 career strikeouts.