After Tyler Colvin tied the game with a two-run single in the 8th inning, the Cubs allowed Cincinnati to push across the game-wining run in the 10th inning on Drew Stubbs fielder's choice that featured a hard slide by Jay Bruce into Ryan Theriot to break up a potential double play.
Several replays showed Bruce moving a sizeable distance outside the base path to take out Theriot, who was unable to execute the throw to first base. Interference was not called on the play, but it appeared Bruce made little or no effort to come in contact with the second base bag.
"I haven't seen it," Cubs first baseman Derrek Lee said. "But it was going to be tough to get Stubbs anyways. He's probably the fastest guy in the league and he hit it to Theriot's left, so it was going to be a real tough double play."
The Cubs also were on the wrong end of a close call at the conclusion of the game when Colvin grounded into a double play, even though the right fielder appeared to have possibly beat the throw to first.
"It was a close play, but those are tough to call either way," Colvin said.
It's easy to understand why Lee and his teammates now sit a season-worst 11 games below .500.
"It's just no secret, we're having a hard time getting runs across the plate," Lee said. "It's no secret. It's been the same story all season."
Before Colvin knocked in a pair of runs in the 8th inning, the Cubs had gone 18 consecutive innings without scoring at home. The Cubs have now scored three or fewer runs in nine of their last 11 games.
Cubs starting pitcher Carlos Silva continues to make a case for an All-Star appearance after recording his team-leading 12th quality start in a no-decision Thursday. Silva, 8-2 with a 2.96 ERA, allowed only two runs in 7.2 innings versus a dangerous Reds ball club.
"It's going to be a big honor for me if they pick me," Silva said. "It would be really nice for me, for my family, especially (after) the last two years."
Silva went 1-3 with a 8.60 ERA for Seattle in 2009.
Infielder Chad Tracy cleared waivers and opted for his release instead of reporting to Triple-A Iowa.