"I don't really have a number (of pitches), but I think he's fine to go deep (Thursday) depending on how he's throwing," manager Dave Roberts said.
The three-time NL Cy Young Award winner has been on the disabled list nearly a month with left biceps tendinitis. He is 1-4 with a 2.86 ERA this season.
Kershaw pitched a four-inning simulated game at Dodger Stadium on Saturday and will take his place in the rotation without making a minor league rehab start.
Kershaw last pitched May 1 at Arizona when he gave up two runs and six hits over six innings in a 4-3 loss.
Kershaw is 3-5 against the Phillies with a 3.16 ERA in 12 starts.