Jarren Duran, Jorge Polanco, Aaron Judge and Month-to-Month Consistency

As with many of my articles, Wednesday’s piece on Jarren Duran had its genesis in one of my weekly chats, back in early January. With the Red Sox dealing with a crowded outfield, a reader proposed a trade return for Duran, and in the context of sidestepping the specifics of the deal, I offered a rather curt dismissal of Duran as having had “a pretty meh age-28 season” in 2025. When I received pushback for that bit of reflexive hyperbole — which stood in contrast to the more measured answers I generally give at a notoriously slower pace — I offered a table of his monthly batting splits, and rather than let a debate hijack the chat, I squirreled away the idea of writing more in depth about Duran at a later date.
That date arrived earlier this week, as I caught up with some of the outfielder’s recent comments and other news out of Red Sox camp while diving into his 2025 season. In terms of value, Duran’s fall-off from a 6.8-WAR 2024 season to a 3.9-WAR ’25 campaign produced the second-largest drop in WAR among players with at least 600 plate appearances in both seasons. Duran was still quite valuable — tied for 16th among AL position players in WAR — but not exceptional. “Pretty meh” was obviously an overstatement, but as I noted in the chat, Duran’s above-average offensive production (a 111 wRC+) was driven by one exceptional month that papered over three subpar ones and two others more or less in line with his seasonal numbers:
| Monthly | G | PA | HR | AVG | OBP | SLG | wRC+ |
|---|---|---|---|---|---|---|---|
| Mar/Apr | 31 | 149 | 2 | .279 | .336 | .426 | 108 |
| May | 28 | 128 | 2 | .258 | .297 | .400 | 87 |
| June | 26 | 114 | 2 | .210 | .301 | .400 | 91 |
| July | 23 | 95 | 5 | .317 | .411 | .683 | 193 |
| August | 26 | 111 | 3 | .239 | .360 | .402 | 112 |
| Sept/Oct | 23 | 99 | 2 | .233 | .303 | .389 | 89 |
| TOTAL | 157 | 696 | 16 | .256 | .332 | .442 | 111 |
Duran’s July sticks out like a sore thumb; he didn’t have a slugging percentage within 250 points of it, or a wRC+ within 80 points of it, in any of the other five months. Take his midsummer surge — which included 35 total bases in 35 at-bats against the Twins, Rockies, and Nationals — out of the equation and Duran hit just .247/.320/.405 (98 wRC+) in the other five months. Read the rest of this entry »






