The Dolphins have had some injury concerns at backup quarterback this summer and they’re responding by taking a look at a veteran option to add to the mix. During an appearance on WSVN in Miami on Sunday, agent Drew Rosenhaus announced that his client Rex Grossman would work out for the Dolphins on Monday. Rosenhaus said other quarterbacks would be working out for the team as well, although Grossman was the only one named. Grossman hasn’t played in a regular season game since starting 13 of them for the Redskins in 2011.