Cabrera took over at shortstop and Peralta moved to second base for the Indians in 2009 before Peralta was traded to the Tigers late last season.
"He's a good player. We are great friends," said Cabrera, who said he learned a lot from Peralta.
Cabrera has been having an All-Star season, leading American League shortstops in average, home runs, RBIs and slugging percentage, and Peralta is second in all those categories.
Unfortunately, only one of them may make the All-Star team. Cabrera is second to Derek Jeter in fan voting for starters, with Peralta in fifth.