While questions remain over Rashford's long-term future ahead of the transfer deadline, Carrick was quick to praise his application since returning to the group.
Addressing the trajectory of the 28-year-old's career last week, Carrick said: "He's a very good player, and I think if you're going to have a career over 10 or 15 years, there's going to be times when things go in a direction and maybe a different direction.
"I think there are ups and downs, and that doesn't judge you as a one-off kind of judgment. It's what happens over time, and now we're in a positive place as a group, and Marcus can offer us so much. He has done, and he can do again, so in that respect, it's quite exciting."