Quintana is coming off a loss to the Cardinals in which he gave up two runs over five innings. The lefty has given up two runs or fewer in five of his last six starts. He beat the Reds on May 19, giving up one hit over seven scoreless innings.
Castillo is 0-4 with a 6.97 ERA in his last four starts and has given up more homers. He allowed two Saturday to the Pirates and has allowed 17 for the season to lead the NL. His velocity has been down and he has allowed more hard contact.