Bud Norris faced two batters in the Dodgers’ 14-3 win over the Diamondbacks on July 31 with a strained lat muscle. (Getty Images)

Put this one in the bizarre baseball injuries file: Dodgers pitcher Bud Norris believes he hurt his back making a pickoff throw to first base.

Norris exited his last start July 31 against the Arizona Diamondbacks when he a strained lat muscle in the first inning. Norris walked the first batter of that game, Jean Segura. Before throwing a pitch to the next batter, Michael Bourn, Norris made two throws over to first base.

“I spun quick,” he recalled. “My left foot kind of caught — my spike caught the dirt. I watched video like five or six times: ‘how did that happen?’ ”

When his spike got stuck in the dirt, Norris believes he may have hyperextended his lat muscle.

After playing catch the last three days without pain, Norris said he will throw a bullpen session tomorrow, an off-day for the club. He is not expected to need a minor league rehab start before he’s eligible to return Aug. 16.