DUNEDIN, Fla. -- There's certainly a reason veteran catcher Gregg Zaun hasn't started in any of the past five games for the Blue Jays, but he insisted on Tuesday that it's nothing to worry about.

"I'm just resting some nagging stuff -- just getting fresh. It's nothing serious," Zaun said while walking through Toronto's clubhouse at Knology park.

Blue Jays general manager J.P. Ricciardi was a little more specific, indicating that Zaun was nursing some tightness in his right hamstring. Ricciardi quickly added that Zaun, who is the club's starting catcher, should be fine in time for Opening Day.

This spring, Zaun is batting .179 with one home run and three RBIs in 12 games for the Blue Jays, but he hasn't appeared in a Grapefruit League game since March 20 against the Yankees. On Tuesday, Zaun was wearing a protective wrap below his right knee.

Over 110 games last season, Zaun hit .242 with 10 home run and 52 RBIs in an injury-marred campaign with the Blue Jays. Zaun, who turned 37 years old in April, missed six weeks between April and June after breaking his right thumb early in the season.

This season, Zaun enters the year as the club's No. 1 option behind the plate and is scheduled to make $3.75 million. The Blue Jays signed catcher Rod Barajas on Jan. 24 to serve as the team's primary backup behind Zaun.