My mom has a soft spot for Raul Ibanez after his two tours of duty in Seattle (career stats), a place he briefly wore uniform #5...way back in 1999.
New York thinks highly of him right now, too--how often do 9th-inning pinch-hitters end up homering twice, let alone in the post-season? (Story and clip of the walk-off homer at SBNation.)
Today's card isn't technically number 5, but at least it's numbered to 5. Thanks to 14K Phillies for these scans.
This 2012 Topps Museum relic subset includes slices from 75 bats swung by both active players and retired HOFers. SportsCardRadio's checklist lays out the whole set; Miguel Cabrera might be its best pickup this year, given his Triple Crown win.