Who pushes 22 in this spot?

[CarlSpackler]

33sng-party poker bb t300

Villain - 4130
Hero - 3870

Villain is big blind (300). Hero (sb150) is dealt 22. Hero pushes. Villain has been tight. Villain folded sb on previous HU hand, and occasionally earlier. Hero had tight image until a few hands ago when Hero completed from sb w/j6o and called bb's rr allin of 765, busting him into 4th place. Villain took out 3rd guy 3 hands later. This is the 3rd hand HU.