Jesse Rogers ESPN Staff Writer
The Cubs are calling up a top pitching prospect as righty Adbert Alzolay will take the place of Tim Collins who was designated for assignment. The Cubs believe Alzolay is on top of his game right now as Theo Epstein said recently his curveball was the best he's seen from him. Fellow Venezuelan and Cubs catcher Willson Contreras had this to say: “I hear really good stuff about him. Really good fastball command. Good spin rate. He's striking people out, he's throwing hard and it makes me proud. I know where he comes from, how hard he works every day to be here and finally his day has come.” A home grown pitcher has been a rare sight at Wrigley Field under Epstein. Alzolay could pitch in relief as soon as Thursday night.