He had already been rehabbing and doing horribly in AAA when he chose to accept his demotion back then. His April OPS was like 300, so he didn't have much hope of catching on in a place of his choosing. He's up past 1000 OPS in June, which probably makes him think he can pick his spot a little more freely, thus, the timing of his tirade. But this also wasn't his first bout of bitchiness on the twitter machine. Yeah, duh, I kind of glossed over the whole, he would have lost the money then point behind this issue.