The Giants and Dodgers are reportedly among the teams interested in the services of free-agent pitcher Randy Johnson. Milwaukee, Oakland, Texas and the Cubs also have expressed varying degrees of interest, sources said. Johnson recently rejected a one-year, $2.5 million offer from the Diamondbacks and filed for free agency. "We've had a lot of inquiries. Nothing formal yet, but we didn't expect anything formal at this point," said Johnson's agent, Alan Nero. "I expect that when some of the trades and free-agent signings get done, things will begin."