Alvarez (shoulder) will throw a bullpen session Saturday, Jane Lee of MLB.com reports.
Alvarez has had a lengthy recovery process, but he seems to be making steady progress now that he's begun to throw again. The team is being careful with Alvarez and hasn't said if they'll aim to have him back this season, and rightfully so. Before getting injured in 2015, Alvarez was coming off a 2014 campaign that saw him post a 2.65 ERA and 1.24 WHIP over 30 starts.