With Jason Bay and Carlos Beltran entrenched in left and center field, respectively, a promotion for Pagan would push Francoeur into a reserve role.
"That's tough to do," Manuel said. "We might have to make a call on that. It might be unpopular, but it's something you have to do."
Since Beltran's return from the disabled list this week, Pagan and Francoeur have formed a right-field platoon. But Pagan entered Sunday's play batting .305 with six home runs and 20 steals; Francoeur was hitting just .249 overall and .135 in July.