Manager A.J. Hinch said Fields (leg) is available out of the bullpen Sunday against the Tigers, Evan Drellich of the Houston Chronicle reports. Hinch noted that Fields was ready to go Saturday if needed, but an excellent start from Lance McCullers made the reliever's services unnecessary. Fields has been dynamic while working in a setup role for the Astros this season, posting a 0.96 ERA, 0.85 WHIP, and a 16:3 K:BB ratio over 9.1 innings.