We've recalled Matt Reynolds & Nimmo.
It's been a tough week for the Mets, who also lost second baseman Neil Walker on Wednesday.
Walker was diagnosed with a partially torn hamstring, an injury he suffered Wednesday while trying to beat out a bunt.
Gavin Cecchini had been recalled from Triple-A Las Vegas to take Walker's spot on the 25-man roster.
Harvey, Lagares and Walker join ace Noah Syndergaard, closer Jeurys Familia, shortstop Asdrubal Cabrera, left-handed reliever Josh Smoker and third baseman David Wright on the disabled list. Lagares, a defensive specialist and former Gold Glove Award victor, was previously removed from the Mets' Thursday evening matchup against the rival Washington Nationals with what has since been diagnosed as a fractured left thumb.
Bour has hit.368 with 13 homers and 31 RBIs since April 30.