Happens all the time. I was just thinking the same thing a few days ago. Hockey is fucked up right now with teams who have clinched playoffs don't give a fuck anymore. I couldn't stop betting in the Hockey contest when I was $2000 above 2nd place. Now I went on a -2000 and have to break out my secret weapon.
I got got a little off topic there, but if you bet on good teams in normal season you shouldn't lose more than 1 or 2 and be able to recoup riding a "quality" team until they win.