In a MTT I'm in middle position with 66. The blinds are 15-30 there is one caller before me and I limp. Two people call after me and both blinds take the flop. The flop comes down 6 8 J rainbow and I check hoping to check raise. It checks around and the turn is a 3. the blinds check and the early position caller bets 30. I raise to 200 about the size of the pot. Everyone folds except the early caller. The river is an A and he bets 100. Because it is so early in the tournament I have not seen him play many hands and I don't have much of a read on him. He seemed to be playing pretty tight but then again it s early. Anyway, I was thinking he had a pair of jacks on the flop with a medium kicker and was hoping for two pair. then with his bet on the river I was thinking / hoping he hit two pair j's and A's. I go all in for 700 chips. he calls and show 88. Was I too agressive on the last bet or was there no way around it.