Second-year player Hertl, 21, made a name for himself last season after a dominant four-goal performance in a 9-2 rout over the New York Rangers last season.
Hertl went on a decline this season, struggling with injuries and totaling just 17 points in 48 games with San Jose, including eight goals and nine assists.
Goodrow, 21, amassed seven points this season with two goals and five assists in 31 games with the Sharks.
DeMelo, 21, returns to Worcester after a brief recall when Braun and Wingels were first placed on IR. He totaled 13 points with three goals and 10 assists for Worcester. DeMelo was the leading scorer for Worcester last season in his 68 games played.