Houston Astros' Dallas Keuchel delivers a pitch against the Arizona Diamondbacks in the first inning of a baseball game, Friday, Aug. 17, 2012, in Houston. (AP Photo/Pat Sullivan)

Arizona Diamondbacks' Jacob Elmore makes his way to first base on a Houston Astros fielding error by shortstop Tyler Greene in the first inning of a baseball game, Friday, Aug. 17, 2012, in Houston. (AP Photo/Pat Sullivan)

Arizona Diamondbacks pitcher Wade Miley heads back to the mound after giving up a single to Houston Astros' Jose Altuve to start the bottom of the first inning of a baseball game Friday, Aug. 17, 2012, in Houston. (AP Photo/Pat Sullivan)

Arizona Diamondbacks' Wade Miley delivers a pitch against the Houston Astros in the first inning of a baseball game, Friday, Aug. 17, 2012, in Houston. (AP Photo/Pat Sullivan)

Arizona Diamondbacks' Chris Johnson makes the catch for an out of Houston Astros' Brandon Barnes in the eighth inning of a baseball game, Friday, Aug. 17, 2012, in Houston. Arizona won 3-1. (AP Photo/Pat Sullivan)

Arizona Diamondbacks' Jacob Elmore bobbles the ball for an error and giving Houston Astros' Justin Maxwell in the sixth inning of a baseball game, Friday, Aug. 17, 2012, in Houston. Arizona won 3-1. (AP Photo/Pat Sullivan)

Houston Astros' Tyler Greene scratches his head during the eighth inning of a baseball game against the Arizona Diamondbacks, Friday, Aug. 17, 2012, in Houston. Arizona won 3-1. (AP Photo/Pat Sullivan)

Houston Astros starting pitcher Dallas Keuchel, left, gets a visit on the mound from manager Brad Mills (2) in the seventh inning of a baseball game against the Arizona Diamondbacks, Friday, Aug. 17, 2012, in Houston. Arizona won 3-1 and Keuchel earned his second loss of the season. (AP Photo/Pat Sullivan)

Houston Astros outfielders Justin Maxwell, left, Brandon Barnes double up on a Arizona Diamondbacks' Chris Young fly ball in the first inning of a baseball game, Friday, Aug. 17, 2012, in Houston. Brandon Barnes made the catch for the out. (AP Photo/Pat Sullivan)

FILE - In this Aug. 17, 2012, file photo, Arizona Diamondbacks' Chris Johnson makes the catch for an out of Houston Astros' Brandon Barnes during the eighth inning of a baseball game in Houston. A person familiar with the situation says Arizona has traded outfielder Justin Upton to the Atlanta Braves in a deal that sends All-Star third baseman Martin Prado to the Diamondbacks. The Braves also get third baseman Chris Johnson. The person spoke to The Associated Press on condition of anonymity on Thursday, Jan. 24, 2013, because the trade has not officially been announced. (AP Photo/Pat Sullivan, File)