Manager A.J. Hinch said Monday morning that Gregerson will open the season as the Astros' primary closer, Julia Morales of ROOT Sports reports.

EDGE Analysis

It was expected that Ken Giles would open the season as the Astros' closer, but he struggled a bit this spring and in his first season with the Astros, so Hinch made the late call to enter the regular season with Gregerson as his closer. While Giles looms in the background, Gregerson does have a history of success as the Astros' closer, saving 31 games for the team a year ago.