Among his peers
Joe Mauer certainly appears destined to have his Twins uniform number retired. Here's how the five former Twins hitters who have had their uniform number retired fared through the season in which they turned 30, and after:
Harmon Killebrew
AgeGABH2B3BHRRBIAvg.
18-3012704397115815814337855.263
31-3911653750 92813210237729.247
Tony Oliva
AgeGABH2B3BHRRBIAvg.
23-309123550109421336132535.308
31-377642751 82311612 88412.299
Rod Carew
AgeGABH2B3BHRRBIAvg.
21-301328505516582416455563.328
31-391141426013952044837452.327
Kirby Puckett
AgeGABH2B3BHRRBIAvg.
24-3010704395140723741108586.320
31-35 7132849 89717716 99499 .315
Kent Hrbek
AgeGABH2B3BHRRBIAvg.
21-3012994670135325016223803.290
31-34 4481522 396 62 2 70283.260