Jimmy Walker opened a four-stroke lead over fellow Texan Jordan Spieth, shooting a 3-under 69 on Saturday in his hometown Texas Open.

Walker, who lives 35 minutes away from TPC San Antonio, is looking for his fifth title in two tour seasons. He had a 9-under 207 total after opening with rounds of 71 and 67.

Spieth shot a 71. The 21-year-old Dallas player, coming off a playoff victory two weeks ago at Innisbrook, had a double bogey, two bogeys and two birdies on the final six holes.

FedEx Cup champion Billy Horschel birdied the final three holes for a 69 to get to 3 under.