By C. Trent Rosecrans
Evening out: The Mets have a chance at improving to .500 with a win over the Pirates tonight. Mike Pelfrey is coming off a good start against the Brewers, but he was battered by the Pirates the last time he faced them, allowing 10 hits and seven runs in five innings. The Mets are 32-33; the Pirates are 31-33 and have Paul Maholm on the bump. Maholm is 2-7 on the season, but has a 3.39 ERA and has allowed three earned runs or fewer in 10 of his 13 starts this season. Mets at Pirates, 7:05 p.m. ET (Follow live scoring)
Bass debut: San Diego's Anthony Bass will be making his big-league debut in place of the injured Aaron Harang. Bass is a combined 7-3 with a 3.41 ERA in 12 starts in Double-A and Triple-A. Last season the 22-year-old led the Class A California League in ERA (3.13), WHIP (1.09), opponents average (.248) and walks per nine (1.4). He went to the same high school as J.J. Putz and broke Putz's high school record by striking out 19 batters in a game. Bass faces Aaron Cook, making his second start of the season. He struck out four in 5 2/3 of a no-decision against the Padres last week. Padres at Rockies, 8:40 p.m. ET (Follow live scoring)
Road, sweet road: The Angels kick off their 12-game, four-city road trip tonight in Seattle, while the Mariners will play 15 of their next 18 games at Safeco Field. The Angels are on the road to make room for U2, which will be playing Angel Stadium on Friday and Saturday. The band needed the extra time for setting up and disassembling its massive stage. On the trip, the Angels will visit the Mariners, Mets, Marlins and Dodgers. Angels at Mariners, 10:10 p.m. ET (Follow live scoring)For more baseball news, rumors and analysis, follow @cbssportsmlb on Twitter or subscribe to the RSS feed.