Aug 30, 2015; Chicago, IL, USA; Seattle Mariners third baseman Kyle Seager (15) hits an RBI single during the eighth inning against the Chicago White Sox at U.S Cellular Field. Mandatory Credit: Dennis Wierzbicki-USA TODAY Sports
21. Seattle Mariners
Seattle has just a .306 team on-base percentage. What’s even sadder is the fact that is the highest on-base percentage a Mariners team has posted since 2009.