Anyone who learned to ride a bike remembers falling off time and time again, and getting back on until they managed to stay up. Seeing Dean Ambrose skulk to the ring Monday night to answer John Cenas open challenge for a United States Championship match had that feeling. Ambrose has been a hard-luck wrestler since the Shield imploded nearly 10 months ago. He came out of it insanely popular with fans, but apparently not with the brass. He got written off TV just as he was heating up, then came back and jobbed to a hologram and an exploding television. At WrestleMania, he got powerbombed through a ladder and lost the Intercontinental Championship ladder match.But Ambrose stepped up to Cenas challenge Monday and fought. The good news is that he is still very popular with the fans, but once again, he lost. And thats where this turns downward: Ambrose keeps losing, and losing and losing. Yes, fans still cheer him, but they are only going to cheer a serial loser for so long. Dean needs to win some battles before he just becomes another hard-luck competitor like Kofi Kingston.