The Game: Baseball
2017 Pre-Season Projections
2017 600 PA / 200 IP Projections
2017 Updated In-Season Projections
Ottoneu Fantasy Baseball
Win Probability & Box Scores
2017 Projected Standings
2016 Playoff Odds
Playoff Odds Graphs
2017 Free Agent Tracker!
Minor League Leaders
Combined WAR Leaderboards
League Average Heatmaps
Team Batting Stats
Team Pitching Stats
Team WAR Totals (RoS)
Team Depth Charts
Positional Depth Charts
K% & BB%
K/9 & BB/9
TZ & TZL
Park Factors by Handedness
Help Support FanGraphs
Become a Member
Already a member?
9/27/1986 (30 y, 4 m, 28 d)
2005 June Amateur Draft - Round: 3, Pick: 21, Overall: 101, Team: Oakland Athletics
$1M / 1 Years (2014)
Mazzaro has joined Sacramento after accepting his assignment to Triple-A, Joe Salvatore of KCBS Radio reports. (5/9/2016)
Pittsburgh Pirates Bullpen
David Wiers (RotoGraphs)
Team Preview: Kansas City Royals
Matt Klaassen (FanGraphs)
Is Anyone* On The Royals Worth Drafting? (Part I)
Mike Axisa (RotoGraphs)
Kansas City's Current Rotation
David Golebiewski (FanGraphs)
Oakland Acquires Oakland-y Player
Matthew Carruth (FanGraphs)
(Click Year to Expand /
Year in Review:
Though it took until his third Major League start for Mazzaro to yield an earned run, he was allowing walks and altogether not pitching at a very high level. The ERA caught up to his performance level and he finished at 5.32 with a 4.93 FIP and 5.60 tRA for his 17 starts with Oakland. During his 90+ innings, Mazzaro struck out 59, a below-average rate, and walked 39, also a worse-than-average rate. Obviously then, his strikeout-to-walk ratio was a meager 1.51 compared to the average American League starter rate of just over 2.00. Also of note was the ground-ball rate of just 39%. If you aren't going to punch hitters out or keep them off the base paths or keep their batted balls on the ground... well... you probably are not very good.
The Year Ahead:
Underwhelming debut season after overwhelming beginning aside, Mazzaro is still just 22 years old and has some decent stuff with a four-pitch repertoire and a fastball averaging 93 mph. He has shown good ground-ball rates in the past seasons at each minor league level, so there is some reasonable expectation that they might return and help reduce his home runs allowed in 2010. However, outside of his 2008 stop in Double-A, Mazzaro's strikeout and walk figures have never been that strong so his immediate future looks no better than that of a mid-to-back-end rotation starter. (Matthew Carruth)
Like many of his Oakland teammates in the starting rotation, Mazzaro managed to outperform his underlying statistics. Despite not striking people out (5.81 K/9) or coaxing ground balls (42.9% GB), he had an ERA in the low fours and caught the eye of Royals GM Dayton Moore. Without the help of the nice home park, Mazzaro may have even more trouble with the home run (1.4 HR/9 in 2010, 1.31 HR/9 career). Mazzaro has some okay secondary stuff, but his fastball isn't very exciting (-14.7 runs above average in 2010, -35.3 runs career). Since his strikeout rates in the minor leagues were also unimpressive, it's on Mazzaro to induce ground balls or he'll never be a true-talent league-average pitcher. Mazzaro should remain undrafted in most leagues -- he's worth a final-round flier pick only in the deepest. (Eno Sarris)
The Quick Opinion:
A fly-ball pitcher that hasn't struck people out in the Major or minor leagues that's leaving a pitcher-friendly ballpark to join a team with a young lineup and one of the worst rotations in baseball? Er, don't sign me up for that, please.
A couple of years ago, Mazzaro looked like a number four starter for the A's with maybe a bit more upside. Apparently that was enough for Dayton Moore to jump all over the chance to trade David DeJesus for him as soon as possible after the end of the 2010 season. It now looks like the trade was little more as a salary dump, as Mazzaro spent most of 2011 at Omaha, and was horrible in limited time in Kansas City (albeit much of that was in one terrible relief outing). Mazzaro is not without potential for being a back-of-the-rotation starter, but that's about it. If it is between him and Sean O'Sullivan, you have to take Mazzaro. Other than that, there's not reason he should grace your roster. (Matt Klaassen)
The Quick Opinion:
"Hey, he's better than Sean O'Sullivan!"
If you would like to make a projection for this player, please
Only stats on the same scale can be grouped.
Updated: Friday, February 24, 2017 3:33 AM ET
Terms of Service
All major league baseball data including pitch type, velocity, batted ball location, and play-by-play data provided by Baseball Info Solutions.
All UZR (ultimate zone rating) calculations are provided courtesy of Mitchel Lichtman.
FOX Sports Engage Network Partner
All Win Expectancy, Leverage Index, Run Expectancy, and Fans Scouting Report data licenced from TangoTiger.com
All minor league baseball data provided by Major League Baseball Advanced Media as distributed by STATS.
Play-by-play data prior to 2002 was obtained free of charge from and is copyrighted by Retrosheet.