Toronto Blue Jays standout first baseman Vladimir Guerrero Jr. was scratched from Tuesday's lineup against the New York Mets due to back tightness.

The Blue Jays initially submitted a lineup with Guerrero's name in it but announced about 90 minutes before first pitch that he had been scratched.

Guerrero has dealt with periodic back issues and he missed consecutive games against the New York Yankees in mid-June when the back flared up.

Sean Keys, who was initially slated to play third base against the Mets, will instead play first base. Luis Urias joined the lineup and will play second base with Ernie Clement moving to third.'

Guerrero is having a sluggish offensive season, batting .268 with just four homers and 34 RBIs in 81 games. The five-time All-Star has hit 23 or more homers in five consecutive seasons.