Rivas is starting in right field Tuesday against the Phillies.
Rivas will draw his second consecutive start and should be in line for increased playing time in the outfield after Jason Heyward (concussion) was placed on the 7-day injured list Tuesday. The 25-year-old made his major-league debut Aug. 29 and has hit .280 with a double, five runs and an RBI in 12 appearances since then.