The Schaumburg Boomers placed the tying run at third base in the ninth inning but could not complete a third comeback attempt, falling to the host Rockford RiverHawks 5-4 on Monday in a makeup game.
Rockford led wire-to-wire, scoring a run in the first. Nate Baumann's sacrifice fly evened the contest in the third before Matt Greener doubled to hand Rockford the lead again.
The Boomers' Karexon Sanchez drilled a 2-run homer on a 3-0 pitch in the fifth to again tie the game but once more the RiverHawks answered.
Chase Fontaine hit his second homer in as many games in the sixth but Rockford was able to work around a leadoff double from Fontaine in the ninth to collect the victory.
Schaumburg is tied with Florence and Lake Erie for the final Frontier League playoff slot with six games remaining. The Boomers own the head-to-head tiebreaker over each team.
The Boomers (51-39) open their final home series of the season today against Southern Illinois, which is just ahead of Schaumburg for the third playoff slot.