Shimkus had thrown more than 50 pitches by the end of the second inning.
The GOP battled back in the top of the third inning, tying it up at 6. Rep. Thaddeus McCotter (R-Mich.) led off the inning with a base hit, followed by a walk to Rep. Sam Graves (Mo.) and a long hit to the outfield by the GOP second baseman, Rep. Kevin Brady (Texas). Rep. Gresham Barrett (S.C.) hit a three-run triple to the gap in left before later scoring what was then the tying run.
With the game tied at 6, Republican manager Rep. Joe Barton (Texas) replaced Shimkus on the mound with Rep. Adam Putnam (Fla.) in the bottom of the third.
Republicans mounted a valiant comeback attempt in the seventh and final inning, but scored only 3 runs before freshman Rep. Duncan D. Hunter (Calif.) ended the game looking at a called third strike.
Democratic first baseman Bart Stupak (Mich.) turned in the defensive play of the game, catching a foul pop as he tumbled over the dugout railing in the fourth inning.