2. Teimana Harrison
Another overseas-born star who has been limited to five caps in a single year – Harrison enjoyed a fine breakthrough year in the 2015/16 season with Northampton Saints.
He was rewarded for his form with a call up to the national side in 2016 but has not appeared since despite forging himself a solid Premiership career. At 27, he still has time on his side, but will he be able to catch the attention of Eddie Jones again?