1995 Leaf #279 Barry Bonds - NM-MT
2012 UTSA Baseball Almanac by UTSA Athletics Communications - Issuu
2013 LMU Baseball Record Book by LMU Athletics - Issuu
1989 Topps Baseball Rookie Card #161 Gregg Olson : Collectibles & Fine Art
Gregg Olson to be inducted into National College Baseball Hall of Fame - Auburn University Athletics
Ernie Camacho Waiting For Next Year
Which MLB player hit the most career home runs without a grand slam? - Quora
Greg Olson – Society for American Baseball Research
Pedro Santana Trades and Transactions by Baseball Almanac
The Weird, Wild, World of Gregg Olson - BallNine
Gregg Olson Baseball Stats by Baseball Almanac