At one time, Benson was a highly sought after pitcher, but fell on hard times in both his personal and professional life. He's pitched for Pittsburgh, the Mets and Baltimore during his seven year Major League career, compiling a record of 68-73 with an ERA of 4.34 in just over 1200 innings.
It's unlikely that Benson will be ready to start the season, but he could be ready not too long after that and provide some insurance for the starting rotation. The Phillies are concerned about starter Adam Eaton, who struggled in his first season with the Phillies and figures to be in their number five spot in the rotation.
Benson will be in Spring Training with the Phillies.