SCOTTSDALE, Ariz. — San Francisco Giants closer Brian Wilson still isn't sure whether he'll be ready for opening day.

SCOTTSDALE, Ariz. — San Francisco Giants closer Brian Wilson still isn't sure whether he'll be ready for opening day.

Wilson has been out for a week because a strained muscle on his left side. He played catch Saturday and intends to have a long toss session today.

Wilson led the majors in saves last year for the World Series champions.

Hampton Retires

Veteran left-hander Mike Hampton retired Saturday, ending a 16-year big league career after giving up on a bid to earn a roster spot with the Arizona Diamondbacks.

"I just knew it was time," the 38-year-old Hampton said in a statement. "The fire is there and the passion will always be there, but physically it was just time to shut it down."

The oft-injured Hampton was 148-115 with a 4.06 ERA in 419 games, including 355 starts.

He began his career with Seattle in 1993 and played for the Houston Astros, New York Mets, Colorado Rockies, Atlanta Braves and Diamondbacks.

He led the National League with 22 wins in 1999 while with Houston. But the two-time All-Star had just 10 wins in the past five seasons.

Hampton had elbow surgery in 2005 and 2007, and rotator cuff surgery in 2009. He signed a minor-league contract with Arizona last August.

Mets

Carlos Beltran played right field for five innings in a minor league game Saturday, seeing his first action in the field this spring as he overcomes tendinitis in his left knee.

He has missed much of the spring due to the tendinitis, which developed as he favored the right knee that was surgically repaired in January 2010. The Mets are hoping he'll be ready for opening day on Friday.

Beltran fielded two balls, both extra base hits, and said he didn't feel any discomfort running in the outfield.

Beltran went 0 for 5 with three strikeouts.