Williamson (shoulder/finger) allowed one earned run on two walks and no walks while striking out three over two innings in a rehab start for Double-A Chattanooga on Saturday. The left-hander also hit a batter.
Williamson, who was placed on the injured list April 30 due to left shoulder fatigue, kicked off a rehab assignment Saturday. After battling some control issues in the first inning, Williamson settled in during the second frame before leaving the contest after tossing 39 pitches. The southpaw will look to build on that workload during his next rehab outing, which is expected to come Thursday with Triple-A Louisville, per Mark Sheldon of MLB.com.