AP photo: The Seattle Mariners shortstop Luis Sardinas chases the Oakland A’s Billy Burns in a run down between first and second base in the fifth inning of Wednesday night’s game at Safeco Field in Seattle

On the MLB podcast with Tony the San Francisco Giants pitcher Matt Cain opens the series in Colorado as the Rockies are some six and half games behind the Giants in the NL West. Cain has had successful outings his last two times out and the rotation has jelled over the last two weeks. The Rockies have some great hitters who can do some damage in Coors Field so the Giants pitchers of Cain and Madison Bumgarner who starts on Saturday will get tested.

The Oakland A’s dropped two out of three to the Detroit Tigers at Comerica Park last month and would like to make amends as they open a three game series in the Oakland Coliseum. The A’s starters consisting of Kendall Graveman, Sonny Gray, and Chris Bassitt are all on the shelf with arm issues. The A’s are now relying on a four man rotation and a bullpen that had struggled over their last week.

Tony Renteria does the MLB Podcast each week at http://www.sportsradioservice.com