Walker was released by the Tigers on Monday.

Walker (hand) was activated from Double-A Erie's 7-day injured list Wednesday and assigned to Triple-A Toledo.

Walker (hand) is expected to resume light baseball activities next week, Evan Woodbery of MLive.com reports.

Walker was diagnosed with a fractured right hand after being hit by a pitch in Tuesday's Grapefruit League game against the Blue Jays, Evan Woodbery of MLive.com reports.

Walker was removed from Tuesday's Grapefruit League game versus the Blue Jays after being hit on the right hand with a pitch, Evan Woodbery of MLive.com reports.

Walker cleared waivers and was outrighted to Triple-A Sacramento on Friday, Susan Slusser of the San Francisco Chronicle reports.

The Giants designated Walker for assignment Wednesday.

The Giants claimed Walker off waivers Sunday and optioned him to Triple-A Sacramento, Maria I. Guardado of MLB.com reports.

Walker was designated for assignment by the Rangers on Thursday.