Since RBI became an official stat in 1920, there have been 65 100 RBI campaigns compiled by 33 different Pirates players. Of those 33, 15 cracked the century mark multiple times, and 10 did it in at least three different seasons.
5: Ralph Kiner, Willie Stargell, Pie Taynor
4: Paul Waner
3: Brian Giles, Glenn Wright, Bobby Bonilla, Gus Suhr, Barry Bonds, Bob Elliott
While Kiner, Stargell, Bonds and most of the other members of this list need no introduction, Wright is a bit of an outlier.