PHILADELPHIA (AP) — The San Francisco Giants have transferred Johnny Cueto to the 60-day disabled list, meaning it will be late June at the earliest before the right-hander returns to the rotation.

Giants manager Bruce Bochy also announced Thursday that fellow ace Madison Bumgarner will throw his first bullpen session next week as the leftie begins to work his way back from a broken pinkie finger suffered in spring training.

The Giants made the move with Cueto on Thursday to free a 25-man roster spot for right-hander Jose Valdez, who was promoted from Triple-A Sacramento. Right-hander Derek Law was optioned to Triple-A, a day after throwing 2 2/3 scoreless innings in an 11-3 loss to Philadelphia.

The Giants announced earlier this week that Cueto would miss 6-8 weeks with a strained right elbow.

Bochy said Cueto perhaps could have returned within 60 days, but they want to be cautious.