Washington moved from Peterborough to QPR in January, and he was immediately given the number nine shirt at Loftus Road.
There were hopes that the 23-year-old could come in and lead the line, after he netted 15 goals in his last 16 matches for Posh.
However, Washington has struggled to make an impact with the R’s - and he is yet to score in any of his first 13 appearances.
The Northern Ireland international looks to be struggling to adapt to playing in the Championship, but MacAnthony insists that he has the ability to play in the second tier.
Needs manager to back him/play him. CW takes time to settle in but when gets going..boom look out. https://t.co/vKDtZKorv4— Darragh MacAnthony (@DMAC102) April 28, 2016
Washington has made just six starts for QPR to date, with his other seven appearances being as a substitute.
He is likely to have a more prominent role to play next season, with the R’s planning on a clear out over the summer months.