And Nick Allen makes 15 — 15 Houston Astros on the injured list. The Astros moved the utility infielder to the 10-day injured list on Monday with mid-back spasms. The move was retroactive to Sunday. Manager Joe Espada told outlets, including MLB.com , that Allen’s back hadn’t responded to treatment. It’s the latest player to be moved to the injured list for the Astros . But it wasn’t the only move Houston had to make on Monday. Per the team, the Astros selected the contract of infielder to take Allen’s spot on the active roster. To make room for him on the 40-man roster, Houston moved pitcher Cristian Javier to the 60-day IL. During the season, players on the 60-day IL don’t count toward the 40-man roster. Houston also announced that pitcher J.P. France cleared waivers and was optioned to Triple-A Sugar Land after being designated for assignment last weekend.…