I dont know the title~ i just remember the trailer.. What movie is this?

Ughh i only have little description of what i remember, but a toned
white man fights in underground fights and i remember in the trailer,
i saw him doing push ups and working out in a subway inside the train
on the seats and i think that he fights and always wins?? im not sure
or he fights because hes got nothing to lose?? ughh i hate how bad my
memory is.. T.T

Could someone get back to me on this?? Or if they can't i would
understand because i gave little info on what i could remember T.T
please and thank you!~