Bettis, Gio seeking rebounds in Nats-Rox tilt

Bettis, Gio seeking rebounds in Nats-Rox tilt

Rockies right-hander Chad Bettis had seemingly turned his season around before a hiccup in his last outing. He will look to get back on track against the Nationals on Tuesday night as he faces off against left-hander Gio Gonzalez at Coors Field.

Bettis had a 5.85 ERA through 17 starts but turned a corner before the All-Star break. With improved command of his fastball, he ripped off six straight quality starts, a streak which ended last Thursday against the Rangers when he allowed five runs in five innings.

"His key is always fastball command," Rockies manager Walt Weiss said. "Not much different than most of the other guys. Fastball command, the ability to get outs with secondary stuff -- the changeup and curveball -- and staying in good counts. All the good things that make the pitcher successful."

Gonzalez carried a 4.81 ERA through his first 16 starts, and then held opponents to a total of 10 earned runs over his next six outings before going flat against the Indians in his last start. He lasted five innings, allowing four runs on seven hits.

Three things to know about this game

• Rockies outfielder Ryan Raburn has seen Gonzalez the most, hitting 7-for-13 with three home runs against the lefty. 

• Gonzalez has not issued more than two walks in five straight starts. During that stretch, he's had a 2.88 strikeout-to-walk ratio. 

• Nationals left fielder Jayson Werth extended his on-base streak to 43 games on Monday, matching the franchise record Ryan Zimmerman set in 2009.

Ben Weinrib is a reporter for MLB.com based in Denver. This story was not subject to the approval of Major League Baseball or its clubs.