Carlos Frias threw four scoreless innings in his latest rehab start at Double-A Tulsa on Tuesday. The right-hander allowed two singles to the Springfield Cardinals, walked none and struck out two.

Frias, who is building up strength after being felled by an oblique injury in March, has allowed one run in seven innings in his first two rehab appearances with Tulsa. He was optioned to Oklahoma City to begin the season but did not appear in a game for the Dodgers’ Triple-A affiliate.