Chicago has lost six straight and eight of its last nine games to fall 6 1/2 games behind Houston in the NL wild-card race. At 54-58, Chicago is in fourth place in the NL Central, four games ahead of fifth-place Cincinnati.
Prior has had his struggles too, going 0-1 with a 6.12 ERA over his last three starts.
The talented right-hander is looking to bounce back from one of his worst starts of the season. Prior was roughed up for six runs and six hits in 4 1-3 innings of a 6-4 loss to the Philadelphia Phillies on Thursday. He served up three home runs and struckout seven.
The Cubs hope to even up their series with the Reds.
Cubs shortstop Nomar Garciaparra went 1-for-4 with a run scored. Garciaparra is 3-for-11 in three games since being activated from the disabled list.
Dunn has been swinging a hot bat over the last 10 games. The Reds slugger is batting .378 (14-for-37) with five home runs and 17 RBIs over that span. Dunn leads Cincinnati with 33 home runs, 80 RBIs and 82 runs scored.
The Reds, who have won two of three, will send righty Aaron Harang to the mound against Prior. Harang has been Cincinnati’s most consistent starter with a 3.90 ERA that belies his 7-10 record. The Reds right-hander is 4-2 with a 3.25 ERA over his last five starts.