Sunderland are now the frontrunners to sign this Premier League striker in the summer. Sunderland go into yet another transfer window where a new striker is their top priority. That’s been the case for at least three transfer windows now; Sunderland signed three last summer in Nazariy Rusyn, Mason Burstow, and Luis Hemir, though they’ve scored just three league goals between them this season. Jobe Bellingham has been left to fill the void in attack, or least sporadically over the past few weeks with Sunderland looking like they’re not even playing with a no.9 at times. Either way, Kristjaan Sp…