Casas (ribs) hit soft-toss pitching and swung off a tee Friday, Peter Abraham of The Boston Globe reports.
Swinging off a tee represents an advancement in Casas' rehab program. The injured first baseman had been limited to dry swings since late June. He's expected to begin a rehab assignment following the All-Star break and is hoping for a late-July return from the 60-day injured list.