Ideally, Robertson could help the Phillies in the later innings in August and September, then slot in the middle of the 'pen come October.

Robertson was optioned to Triple-A Lehigh Valley, where he'll likely make a few appearances before being called up. The Phillies will pay Robertson about $5.5 million on a pro-rated $16 million contract,

The Philadelphia Phillies are set to sign veteran right-handed reliever David Robertson to a one-year, $5.5 million deal prorated at $16 million.