The Phillies gave righthander Sean O'Sullivan his outright release Monday, opening a spot on their 40-man roster.
O'Sullivan, 27, went 0-1 with a 6.39 ERA in three games for the Phillies this season. He also has pitched for the Angels, Royals, and Padres.
At triple-A Lehigh Valley this season, O'Sullivan went 6-10 with a 4.30 ERA in 25 starts.
The Phillies hired longtime pitching coach Rafael Chaves to be their minor-league pitching coordinator.
Chaves, 46, spent the 2014 season as a special assistant for player personnel with the Los Angeles Dodgers. He spent five years as the Dodgers' minor-league pitching coordinator.
Chaves was the Seattle Mariners' pitching coach from 2006-07. He also served as a minor-league pitching coach with Scranton/Wilkes-Barre, Tacoma, San Antonio, San Bernadino, Wisconsin, rookie-level Everett, and the Arizona League Mariners.