The White Sox announced that they’ve placed shortstop Tim Anderson on the injured list due to a right ankle sprain, recalled outfielder Daniel Palka from Triple-A Charlotte and selected the contract of left-hander Ross Detwiler from Charlotte. The team’s previously reported DFA of Yonder Alonso is now also official.

There’s still no official word on how long Anderson will be sidelined, though he was wearing a walking boot earlier this week when it became apparent that an IL stint was quite likely. The 26-year-old shortstop is in the midst of a his best season, having batted .317/.342/.491 with 11 homers and 15 steals in 281 plate appearances. The free-swinging Anderson is still loath to take a walk (2.5 percent) and has benefited from a .373 average on balls in play, but he’s also made dramatic improvements in his hard-hit rate and average exit velocity, per Statcast.