Padres’ Klesko Out Two to Four Months

San Diego Padre first baseman Ryan Klesko will have surgery on his left shoulder Monday and expects to sit out two to four months.

Klesko has been bothered by soreness in his throwing shoulder since late in spring training and started the season on the disabled list.

Klesko had two cortisone shots in the shoulder recently and considered playing through the pain.

But he decided to have surgery after the team’s medical staff reviewed the results of an MRI exam from earlier this week.

“It’s probably best to go ahead and do it instead of having a roller-coaster all year,” Klesko said after San Diego’s 10-4 loss to Colorado on Friday night.

“The MRI did not show very good news.”

Klesko, 34, in the final year of his contract, said he hopes to return around the All-Star break.

San Diego-area native Adrian Gonzalez opened the season at first base.

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Chicago Cub General Manager Jim Hendry agreed on a two-year contract extension through the 2008 season.

Hendry joined the organization in 1994 as player development director and assumed the general manager duties from President Andy MacPhail in 2002.