And Moyes hopes to build a stronger squad in the close season to ensure they mount a renewed bid for Champions League football next season.
"I would say that maybe we don't need more players, just more players with quality," he said.
"We sold James McFadden and then picked up some serious injuries to Cahill and Vaughan. That takes its toll.
"I am happy with the numbers here, just that one or two have not worked or offered enough to the squad. That has affected things. We have always been looking to add to the numbers, but mainly to the quality."