Too much money spent on your bench. Here's a team of mine in Yankee 71 that made the playoffs with 87 wins an won its first playoff round. Note that I have 6 hitters and 2 pitchers with salaries under .75 million. Also note how few AB / IP they consumed. Pouring money into guys who aren't going to play is a sure recipe for losing.
Also note the difference in the cost of my bullpen vs. the cost of yours. I would turn Eck, Orosco, Reardon, and Hrabosky into 3 guys with a combined salary of about 3.75 million, and pick up a cheapo bench player with the 4th.
As far as my lineup goes, this was a 24-team league, so you can do better at almost every position than I did. And your season is under way, so you have roster move costs. Anyway, welcome back!
http://onlinegames.strat-o-matic.com/team/389274