Sean Forman: WAR is “GDP for baseball”

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There was some big news in the baseball stats community recently, as Baseball Reference and FanGraphs agreed to a common replacement level in their Wins Above Replacement statistic. Though the two sites’ computation of the statistic still differs in other ways, creating some uniformity in replacement level should clear up some of the confusion around the stat among casual observers.

Sean Forman, the creator of Baseball Reference, responded to some general criticisms of WAR yesterday. Most notably, he referred to WAR as “GDP for baseball”. GDP, of course, stands for Gross Domestic Product, an estimate of the market value of a country’s goods and services. WAR often gets tossed aside because it’s complicated, requires a lot of steps to calculate correctly, and is a single number that covers broad subject matter, but Forman shows how those criticisms are not levied against GDP despite being very similar in nature. If you trust GDP, you should trust WAR.

(Obligatory picture of Mike Trout above, just because.)

Video: J.D. Martinez hits league-tying 23rd home run

Seattle Mariners v Boston Red Sox
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The Red Sox and Mariners left nothing on the table Friday night, going head-to-head in a series opener that eventually ended 14-10 in the Sox’ favor. Led by Steven Wright and Wade LeBlanc — neither of whom made it past the fifth inning — the teams combined for 34 hits and four home runs, including two moonshots from Seattle’s Nelson Cruz and a five-run rally that gave Boston the edge in the seventh.

In the sixth inning, however, the Red Sox were still scrambling to make up a four-run deficit. Left fielder J.D. Martinez cut it in half with one swing, pouncing on an 89.5-mph fastball from Seattle right-hander Nick Vincent and posting it to dead center field for a two-run shot.

The 427-foot blast was Martinez’s 23rd of the season, tying Mike Trout for the most home runs in the league this year. While he still has a ways to go before eclipsing the career-best 45-HR mark he set in 2017, he’s off to a strong start this season: Entering Friday’s game, the 30-year-old slugger was batting .315/.386/.623 with a 1.009 OPS and AL-leading 55 RBI in 308 PA. He finished Friday’s game 4-for-5 with five RBI, just one triple shy of hitting for the cycle.

Heading into the All-Star Break, both Martinez and Trout still have some competition for the home run title. Jose Ramirez is sitting at 22 homers, while Nelson Cruz and Khris Davis are tied at 20 apiece.