The free-agent list looks particularly stacked this summer, even beyond the perennially Manchester United-linked Adrien Rabiot. While Memphis Depay secured his switch to Corinthians this week, Anthony Martial will not be joining his former Red Devils’ teammate in Brazil. Three months after Martial left Manchester United upon the expiry of his contract, Flamengo eventually turned down the opportunity to sign the injury-hit Frenchman. Compatriot Rabiot, meanwhile, is still awaiting a fresh start of his own. Caught Offside report that the former Juventus and Paris Saint-Germain midfielder remains…