Sierra was released by the Dodgers on Thursday, freelance writer Francys Romero reports.
Los Angeles gave Sierra a six-year, $30 million contract back in 2016, but the Cuban right-hander hasn't panned out. Sierra pitched 16.1 innings for the organization's Triple-A club this season, posting a 13.78 ERA and 2.98 WHIP across 16.1 innings.