According to a published report last week, Montero was named in records belonging to Biogenesis of America LLC, the now-closed clinic in Coral Gables, Fla., that has purportedly been linked to performance-enhancing drugs. Montero said he didn't know why his name popped up in the records.
"I don't have anything to do with those people. I know my agency is handling everything. I don't know anything about it," Montero said.
"I'm here trying to be ready for spring training and the season. What can I say? It surprised me, too," he added.
Montero also said his brother, who has the same first and last name, has nothing to do with the clinic. He's confident that his agents, Sam and Seth Levinson, will clear up the matter.
"I just want to focus on baseball," Montero said. "They're (agents) going to handle everything. .... I know I didn't do anything wrong."
Montero looks leaner than he did last spring, his first with the Mariners, and attributed that to an offseason conditioning program in his native Venezuela. He worked on better running techniques with a trainer, not to improve speed so much as to be more technically sound.
He said he worked out one or two hours a day, five times a week.
"This year was nothing about hitting, nothing about catching, just concentrating on my body and getting in shape and trying to be better in running and be more flexible," Montero said.
Montero, 23, batted .260 with 15 home runs and 62 RBIs last season. He was the Mariners' starting designated hitter for 77 games and started at catcher for 55.
Montero enters 2013 as Seattle's expected everyday catcher. He was brought in last month to be looked over by team personnel to make sure he was serious about his offseason training program, and also was invited to manager Eric Wedge's home with his family for a conversation about being the everyday presence behind the plate.
"He was telling me that. That makes me happy," Montero said. "That makes me want to work harder now that I'm going to be the catcher here every day for a long time."
Montero will be catching a lot of pitchers in spring training, including left-hander Joe Saunders, whose one-year deal with the Mariners was announced late Tuesday. Saunders' deal with Seattle includes a mutual option for the 2014 season. Saunders pitched for Arizona and Baltimore last season and was 9-13 combined. He was 1-0 in two postseason starts for Baltimore.
He'll immediately get a shot to be in a Mariners starting rotating that is filled with questions after ace Felix Hernandez and Hisashi Iwakuma. Seattle designated for assignment first baseman/designated hitter Mike Carp, who was left without a role thanks to the Mariners' other offseason moves.
Also getting a chance at a rotation spot will be veteran right-hander Jon Garland, who signed a minor-league deal as non-roster invitee.
Garland, 33, did not pitch in 2012 while rehabilitating from right shoulder surgery but passed his physical. He has a 132-119 career record with a 4.32 ERA. Garland has pitched for the Chicago White Sox, Los Angeles Angels, Arizona Diamondbacks, Los Angeles Dodgers and San Diego Padres.
"I'm excited to test the arm and just get the competitive juices going again and then get back there on the mound," Garland said, proclaiming himself fully healthy. "One hundred percent. There's no question in my mind."
Seattle also signed former Milwaukee reliever Kameron Loe to a minor-league deal on Tuesday. Loe appeared in 70 games, going 6-5 with a 4.61 ERA last season for the Brewers.