#6 Joel Campbell
Joel Campbell joined Arsenal in 2011 and has since gone out on six loan spells to five different clubs.
Campbell spent last season on loan at Real Betis for the second time in his career. Initially his time at Betis was unfortunately disrupted by a knee injury, but he returned to the squad in emphatic fashion by scoring and assisting on his first game back. He was then out with a sprained ankle and managed to return for the final few matches of the season.
Campbell will need to stay fit and perform well in Russia. Hopefully, if he does put in good performances for Costa Rica, he stands a chance of making a permanent switch away from Arsenal to either Real Betis or another club.
He is not as bad as his track record so far makes him out to be, and if he manages to stay injury free, he might still stand a chance of establishing himself as a regular and a consistent winger given that he is still only 25.