RENTON, Wash. -- Seattle Seahawks tight end Anthony McCoy, who missed all last season after undergoing surgery for a torn Achilles tendon in his right ankle, appears to have torn his left Achilles tendon during practice Tuesday.

"If it is what we think it is, it's just a real heartbreaker," said Seahawks coach Pete Carroll. "Anthony has worked so hard to get back. If it was the same Achilles you might understand it, but it's the other one."

McCoy was expected to make the team as the third tight end behind Zach Miller and Luke Willson, but his injury opens an opportunity for Cooper Helfet and rookie RaShaun Allen.

Left guard James Carpenter and middle linebacker Bobby Wagner left practice early, but Carroll said both are OK.

"His calf just got tightened up a little bit so we pulled him out early," Carroll said of Carpenter. "It was the same type of thing on Bobby with the hamstring."

Rookie outside linebacker Kevin Pierre-Louis missed practice Tuesday with a stomach injury.

"He's got a little oblique thing that has bothered him," Carroll said of Pierre-Louis. "We're hoping it's not a serious deal, but we want to make sure we don't push him too hard or two fast."

Outside linebacker O'Brien Schofield did not practice Tuesday, but he was getting a rest day.