Poker tournaments.

I'm good at cash games. When I play cash games I do make a good profit. But when It comes to tournament I suck. I don't know why but I run so bad in the tournament. Does it happen to anyone else ?

Yeah it can because it’s a different game with different strategies. In cash games you are playing with 100+ BBs mostly and in tournaments you start out with a big stack and then blinds increase and you have to learn how to play with shorter stacks.