I'm a huge Mariners fan and personally it seems they are playing above their means right now. You never know though, in 2001 no one thought they had that great of a team but somehow they found a way to win over 100 games. Wakamatsu gets a lot of credit for the clubhouse environment but I give most of the credit to Griffey. The guy is an amazing clubhouse presence and is making sure every player on that team is having fun right now.
As for Texas, I could see them trading one of their catching prospects for an arm. They've got 2 stud prospects they might as well. I just don't see Texas being a contender they are just way too inconsistent and make too many mistakes.
Don't count out the A's, they always have a stretch in the season where they will reel off like a 20-4 stretch. If their young arms can gain some confidence they could get hot.
Like many have already mentioned, Angels are just dessimated with injuries. Vlad is going to be out longer than a month, I can almost guarantee that. He is the spark in their lineup like Gimme said, without him they are in big trouble, even more so than missing an ace like Lackey.