The Mariners acknowledged the preliminary report and said Sucre was undergoing imaging tests Monday in Venezuela to further determine the extent of the injury.
A broken fibula would sideline Sucre for at least six weeks, which means he'll miss the opening weeks of camp, which starts Feb. 19.
Sucre is a solid defender with a strong throwing arm, but has struggled offensively over the past three years, posting a .178/.206/.229 line in 79 big league games. He batted .157 with one homer and seven RBIs in 127 at-bats in 52 games last season and figured to open camp behind newly acquired veterans Chris Iannetta and Steve Clevenger, as well as 2012 first-round Draft pick Mike Zunino.