JULY 17: Hahn told reporters, including MLB.com’s Jane Lee, that upon receiving a second opinion, it’s been confirmed that there’s no ligament damage in his elbow (Twitter link). Hahn is still, however dealing with inflammation — specifically in his forearm, per the San Francisco Chronicle’s Susan Slusser (on Twitter). He’ll be shut down from throwing for more than a month.
JULY 16: Athletics right-hander Jesse Hahn will be sidelined indefinitely and spend a “somewhat extended stay” on the disabled list with a flexor tendon injury, GM Billy Beane told John Hickey of the Bay Area News Group.
“We’re going to be conservative with Jesse,” said Beane. “And the tough thing with is starters is once they’re shut down, it take a while to build back up. So it’ll be longer rather than shorter.”
In the meantime, Hickey notes, right-hander Chris Bassitt is likely to be recalled from Triple-A to step into the club’s rotation (once a fifth starter is needed on July 25). Both Hahn and Bassitt were acquired in offseason trades, with Hahn coming from San Diego by way of the Derek Norris deal and Bassitt coming over from the White Sox as part of Oakland’s compensation for Jeff Samardzija.
Hahn has been largely excellent while working out of the Athletics’ rotation — 3.35 ERA, 6.0 K/9, 2.3 BB/9, 52.6 percent ground-ball rate — making the loss a reasonably large one for Oakland. Bassitt has handled himself well in a trio of spot starts and a handful of relief appearances, compiling a 2.93 ERA, but he’s an extreme fly-ball pitcher that has been fortunate in terms of home runs allowed, leading sabermetric stats to forecast a far gloomier picture (4.05 FIP, 5.44 xFIP, 4.96 SIERA).
The Athletics currently sit in last place in the AL West, eight and a half games back from the division-leading Angels and eight games behind the current Wild Card leaders — the Twins and Astros. Hahn’s injury comes at a critical time for an Oakland team that is widely expected to become a selling club but still hopes to claw its way back into the division race prior to the non-waiver trade deadline on July 31.