Hellickson is taking the rotation spot of the struggling A.J. Cole, who has given up 12 runs in nine innings across two starts to begin the season. There is a chance Cole could be sent down to Triple-A on Monday when the Nationals need to open up a spot on the 25-man roster for Hellickson.
The Nationals signed Hellickson to a minor league deal in mid-March, then re-signed him to a new minor league deal at the end of the month. Last season between the Phillies and Orioles, Hellickson put up a 5.43 ERA with a 96/47 K/BB ratio in 164 innings of work.