The team will reveal a statue in Coleman's honor at Petco Park. Fans who are attending the game are encouraged to be in their seats by 5 p.m.
San Diego manager Bud Black, for one, is looking forward to the ceremony to honor Coleman, who has spent the last 70 years in professional baseball as a player and broadcaster, 40 of which have come with the Padres.
The first 25,000 fans in attendance will receive a commemorative Jerry Coleman Day patch. There will be a flyover of Marine Corps F-18 jets as well. Coleman was a Marine fighter pilot in World War II and Korea.
"A lot of native San Diegans, when they think of the Padres, they think of Jerry Coleman," Black said of Coleman, who turned 88 on Friday.
Third baseman Chase Headley, who made his Major League debut with the team in 2007, said he's never met anyone quite like Coleman.
"He's an older guy, but has so much energy," Headley said. "He's awesome. I didn't know his story when I first got to meet him. Then you find out what he did on the field, his military service and then what he has done as a broadcaster. It's amazing."
Headley was surprised to hear that Coleman turned 88 on Friday.
"For turning 88, you'd never know it," he said. "[He] has a tremendous personality and he loves what he's doing. He's just fun to be around."