How to Profit From MLB Umpire Assignments

The 2016 MLB season is just a few days away, and our goal at Sports Insights is to ensure that bettors have the best strategies for the upcoming year. Our recent betting against the public report details the sweet spot for contrarian betting, but there are many factors that should be considered before placing a wager.

Last week we introduced a new officials page which tracks the record for NBA referees and MLB umpires. For those who aren’t familiar, baseball utilizes a four-man umpire crew for every series. Typically the assignments aren’t announced until several hours before first pitch, and officials will rotate clockwise for the subsequent game. That means that the second base umpire will work first base the following day and home plate the day after that.

Historically underdogs have provided value across all six major US sports, but baseball is the only sport in which the importance of home field advantage has been undervalued. Although most bettors seem to believe that crowd noise is the main factor benefiting home teams, baseball is the only sport where those teams have concrete advantages. Not only do home teams get to bat last, but they’re also accustomed to the unique dimensions of their ballpark.

Since home teams and unders have historically provided value, those are the criteria used on our officials page. That said, there is no shortage of umpires who have been highly lucrative for visitors and overs.

The tables below display the five most profitable umpires for home teams, road teams, overs and unders since the start of the 2005 season.

* Indicates official is inactive

Best Home Umpires

Ump Record Units Won ROI
Lance Barksdale 211-137 +42.38 12.2%
Wally Bell* 184-123 +31.42 10.2%
Tim McClelland* 175-128 +23.37 7.7%
John Hirschbeck 139-98 +21.42 9.0%
Tony Randazzo 184-128 +20.83 6.7%

Best Away Umpires

Ump Record Units Won ROI
Joe West 184-192 +24.01 6.4%
Tom Hallion 182-175 +23.76 6.7%
Paul Nauert 173-175 +19.66 5.6%
Bob Davidson 177-189 +18.59 5.1%
Tim Welke 167-178 +18.32 5.3%

Best Over Umpires

Ump Record Units Won ROI
Sam Holbrook 172-132 +33.22 10.9%
Larry Vanover 185-158 +22.83 6.7%
Jerry Meals 183-157 +19.86 5.8%
Gabe Morales 39-18 +19.60 34.4%
Tim McClelland* 154-128 +16.21 5.7%

Best Under Umpires

Ump Record ROI Units Won
Ron Kulpa 198-139 13.2% +44.54
Bill Miller 203-150 10.5% +37.05
Marty Foster 179-148 6.4% +20.78
James Hoye 171-140 6.5% +20.29
Andy Fletcher 169-142 6.3% +19.48

It’s interesting to see that Ron Kulpa has been far and away the most profitable under umpire in our database. Over the past eleven seasons the under has gone 198-139 (58.75%) with +44.54 units won when Kulpa is behind home plate.

Since the start of the 2005 season, unders have gone 13,093-12,667 — a winning percentage of 50.8%. Although this doesn’t come close to the 52.38% threshold needed to break even at most sportsbooks, it displays a clear edge. Even so, there are no shortage of profitable over umpires.

In games with Sam Holbrook behind home plate, the over has gone 172-132 (56.58%) with +33.22 units won. He’s been especially profitable in divisional games, with the over hitting at a 62% clip.

You’ll notice that two of the five most profitable “homer” umpires are no longer active. Tim McClelland retired prior to the 2015 season while Wally Bell suffered a heart attack and died on October 14, 2013. By extending the list to include only active umpires, we found find that Alfonzo Marquez (185-136, +18.95 units) and John Tumpane (62-34, +17.56 units) would round out the list.

We will definitely be following the progress of Gabe Morales, who made his MLB début back on April 2, 2014. In just two seasons, Morales (39-18, +19.6 units) has emerged as one of the best over umpires. Typically being a good over umpire means calling a very tight strike zone, and it will be interesting to see if that zone beings to expand at all in his third season.

Bettors can track the latest odds, betting percentages, injuries and more by visiting our free MLB odds page. Interested in receiving our highly profitable Best Bets or the Pinnacle ML steam move? Sign up for Sportsbook Insider today!

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David Solar

David Solar is the Content Manager at Sports Insights. He specializes in sports betting analytics and creating data-driven betting systems. He can be reached directly at or on twitter at @TheDavidSolar.

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