Denorfia, acquired on July 31 from the Padres, has hit .244 in 16 games with Seattle, including a .312 mark over the last 10 games after getting off to a 1-for-13 start with his new club.
Chavez is hitting .272 in 63 games for the Mariners in his 13th season in the Majors.
Greg Johns is a reporter for MLB.com. Follow him on Twitter @GregJohnsMLB as well as his Mariners Musings blog. Adam Lewis is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.