Frias, a 26-year-old Dominican who pitched primarily at Double-A Corpus Christi last year, took over in the third inning and walked Juan Perez before giving up consecutive homers to Andrew Romine, Ian Kinsler and Victor Martinez. His next pitch -- a breaking ball -- appeared to strike Cabrera in the head.
Astros manager A.J. Hinch darted to the mound as home-plate umpire Hunter Wendelstedt ejected Frias. Cabrera wasn't injured and trotted to first base without incident.
Brian McTaggart has covered the Astros since 2004, and for MLB.