The Mariners do not have any 2010 options. Instead, they're looking at the completion of the Adrian Beltre, Jarrod Washburn, Miguel Batista, and Erik Bedard contracts after '09 (among others). Those four represent $40MM coming off the books. However, it's also 40% of the starting rotation and the starting third baseman.
Assuming Jack Zduriencik does not want to tangle with Scott Boras over Beltre, he could consider 23 year-old prospect Matt Tuiasosopo for the hot corner. Tuiasosopo just began his second Triple A stint, and it's not going well so far. The Ms could explore the free agent market, which will include Joe Crede, Chone Figgins, Troy Glaus, and perhaps Melvin Mora.
The rotation should be interesting, especially with Brandon Morrow deciding his future is in the bullpen. If the Ms go outside the organization for a veteran starter or two, I'm guessing they'll sign a bargain free agent or make a trade.