Betcha didn't know Tom Glavine was a huge Catholic antiques collector!!
Well ... he WAS a huge antiques collector, but the Hall of Famer is parting ways with some of his beloved historic items ... and now they're hitting the auction block!!
TMZ Sports spoke with Charles Pharr -- owner of Four Seasons Auction Gallery -- who says Glavine and his wife are looking to move into a new house and wanna get rid of some extra stuff.
Some of the notable items include:
French cabinet -- estimated $1,600
Church offering podium -- est.