Brett Tomko joins a staff that also includes Derek Lowe, Brad Penny and Odalis Perez. However, his signing does not mean the Dodgers have ruled out re-signing free agent Jeff Weaver, their best pitcher last year. "This does not close the door on Jeff," said Colletti, who remains in contact with Weaver's agent, Scott Boras. Nevertheless, Colletti is actively trying to add a fifth starter to the staff, and hasn't ruled out a trade if it looks like Weaver is headed elsewhere. Colletti is mulling trade options with at least three other teams for a starting pitcher, and is willing to dip into the Dodgers' deep farm system to close the right deal. "I'm not afraid to go into the trade market," Colletti said.