By C. Trent Rosecrans
WHO'S THE UNDERDOG? One pitcher has a Cy Young Award on his shelf and two other top-three finishes in the voting, the other has three years of experience in Japan and went nearly seven years between winning starts in the big leagues. Yet, this season the Giants' Ryan Vogelsong is 3-1 with a 1.77 ERA this year and 2-1 with a 0.34 ERA in his last four starts, while Chris Carpenter is 1-5 with a 4.58 ERA. The Cardinals have gone 2-9 in Carpneter's 11 starts this season and winless when he starts at Busch Stadium. Giants at Cardinals, 7:09 p.m. ET (Watch live)
LYLES DEBUTS: Houston's top prospect, Jordan Lyles, will make his debut tonight at Wrigley Field against the Cubs. The 20-year-old right-hander is pitching in Wandy Rodriguez's spot and will start at least two games, tonight and then Sunday at Petco Park against the Padres. At Triple-A Oklahoma City, he's gone 3-3 with a 3.20 ERA, including six shutout innings in his last start. While he has a good fastball, it's Lyle's changeup and slider that get scouts excited. Astros at Cubs, 8:05 p.m. ET (Watch live)
FAMILIAR FACES: It was one of the biggest trades offseason leading up to 2008, and for so long it appeared the Orioles got by far the better deal with the Mariners, as center fielder Adam Jones made the All-Star team in 2009 and a Gold Glove, while Erik Bedard was limited to just 15 starts in each of his first two seasons in Seattle before missing all of 2010 as a result of labrum surgery in 2009. Bedard has been impressive so far this year, going 3-4 with a 3.48 ERA, and 3-0 with a 1.09 ERA in his last five starts. Jones is 2 for 5 with a double in his career against Bedard. Orioles at Mariners, 10:10 p.m. ET (Watch live)For more baseball news, rumors and analysis, follow @cbssportsmlb on Twitter or subscribe to the RSS feed.