SEATTLE -- The Cubs will recognize former player and current broadcaster Ron Santo in honor of his 50 years of service to Major League Baseball with a special pregame ceremony prior to their June 28 game vs. Pittsburgh at Wrigley Field.

Santo is expected to deliver the game's ceremonial first pitch and will sing during the seventh-inning stretch on July 1. Flags honoring his 50 years in baseball will fly from Wrigley Field's roof starting next Monday evening.

"I am so fortunate to have been in baseball for 50 years, and it is incredibly heartwarming to be recognized by the Cubs for that achievement," Santo said. "I'm grateful and thankful to be associated with the Chicago Cubs. I wouldn't change the last 50 years for anything."

Santo made his debut June 26, 1960, with the Cubs and played 14 seasons as the team's third baseman. He was a member of nine All-Star teams and won five consecutive Gold Gloves while playing for Chicago.

He joined the Cubs' broadcast booth in 1990 as the WGN radio color commentator, where he continues to broadcast today. The team retired Santo's No. 10 jersey on September 28, 2003.

"Ron Santo has contributed so much to the Cubs organization both on and off the field over the last 50 years," said team chairman and owner Tom Ricketts. "We're thrilled to recognize him for his dedication to this team."

To help fans celebrate with Santo, the Cubs are offering a limited allotment of $10 bleacher seats throughout the team's next homestand against Pittsburgh and Cincinnati. Fans can purchase these tickets by entering the promo code "SANTO" when purchasing bleacher tickets on Cubs.com.

Aramis to be activated from DL on Friday

SEATTLE -- Aramis Ramirez was back with the Cubs on Tuesday, but he's going to have to wait a few more days before he takes the field in a game.

The Cubs' third baseman, who is coming back from a left thumb contusion that's had him on the disabled list since June 9, went 1-for-6 in two games with Class A Peoria and took batting practice with the team at Safeco Field before Tuesday's game against the Mariners.

Manager Lou Piniella said the team will wait two days to activate Ramirez and put him back in the lineup Friday against the White Sox.

As for Ramirez, he said the problem -- a persistent bone bruise across the base of his left thumb that is aggravated by swinging -- will undoubtedly linger throughout the season.

"It's not going to be 100 percent, I don't think, for the rest of the year," Ramirez said. "It's good enough to play, though. It's going to be there. It's not going to go away in two weeks. But I guarantee there's 24 guys in here that aren't 100 percent, and they're going out there and playing the games. So if they can do it, I can do it."

Ramirez has already changed his hitting grip with the help of coach Rudy Jaramillo. He'll have a few more days of hitting on the field and in the cage, getting more familiar with the grip, before testing it out in a big league game.

"It's helping," Ramirez said, "but I've got to get used to it because I've been hitting the same way for 15 years."

Hamstring keeps Silva from dueling ex-mates

SEATTLE -- The stage was set for a bit of drama, with former Mariners starter Carlos Silva set to pitch against his former teammates on Thursday.

But the right hamstring that Silva tweaked in his previous start against the Angels will keep him out until at least Saturday, manager Lou Piniella said.

"He tweaked it pretty good the other day, and we had to get him out of the game after 69 pitches," Piniella said. "He had a throw-day today with the pitching coach [Larry Rothschild]. It was decided that we should hold him back and give him a little more time, and that's exactly what we're going to do."

Silva is now slated for Saturday's start against the White Sox, and lefty Ted Lilly will get the ball Thursday against Mariners ace Felix Hernandez. Carlos Zambrano will now start Friday and Tuesday's starter, Ryan Dempster, is scheduled to toe the slab on Sunday.

Cubs agree to terms with third-round pick Gibbs

SEATTLE -- The Cubs announced Tuesday that they agreed to terms with their third-round selection in the First-Year Player Draft, catcher Micah Gibbs from Louisiana State University.

Chicago has now agreed to terms with 20 of its 50 selections from the 2010 Draft, including three of its first four, 11 of its first 16 and 13 of its first 20 picks.

In addition to Gibbs, the Cubs also announced the signings of infielders Pierre LePage (13th round) and Elliot Soto (15th round), right-handed pitcher Ryan Hartman (16th round) and catcher Chad Noble (37th round).

Gibbs batted a team-leading .388 (95-for-245) with 47 runs, 14 doubles, three triples, 10 home runs and a .458 on-base percentage in 62 games as LSU's starting catcher. Gibbs, a 21-year-old switch-hitter, was signed by area scout Jim Crawford.