Adrian Beltre has calf strain

SURPRISE, Ariz. -- Texas Rangers third baseman Adrian Beltre has a mild strain of his right calf muscle and was not scheduled to run on Monday.

Beltre said he felt the calf as he was running on the treadmill at his house and decided to back off it a little. He took ground balls at third base and participated in batting practice.

"We'll wait a couple of days and see how it feels," Beltre said. "It's not a big deal."

Meanwhile, the Rangers' big pitching addition got in some work Monday. Brandon Webb, who has made one start in two seasons due to shoulder surgery, went out early Monday and had a long toss session under the watchful eye of pitching coach Mike Maddux.

The Rangers don't want Webb getting back on a mound until they feel like he has fully built up his arm strength, so he'll continue to throw long toss at this point. Webb stressed that he feels fine physically.

"It's just precautionary to make sure I'm not going to hurt myself," Webb said. "I don't think I'll be set back too far. I threw 50 or 60 pitches off a mound before I got here and felt fine."

In other Rangers injury news:

• Right-handed pitcher Omar Beltre's spinal surgery has been pushed back to Wednesday. Dr. Drew Dossett will perform the procedure in Dallas.

Beltre has stenosis, a narrowing of the spinal column, and will be out for at least six weeks following surgery.

• Outfielder Craig Gentry is expected to hit with a fungo on Wednesday as he continues to deal with his right wrist, which was fractured when he hit the wall in Triple-A last year.

• Left-handed pitcher Miguel De Los Santos had biceps tendinitis in winter ball and came into camp a little behind. He's expected to throw off a mound this weekend.

Richard Durrett covers the Rangers for ESPNDallas.com.