Teenager Jake Forster-Caskey and fellow midfielder Rohan Ince, 20, have been thrown in at the deep end this season with the Seagulls missing key players like Liam Bridcutt, Andrea Orlandi and Craig Mackail-Smith.
Despite the casualty list Brighton are unbeaten in six matches and rose to 10th in the table after Saturday's 3-1 win over Bolton.
"Our mental strength is a positive because when you have many injuries you have to be strong," said Garcia.
"All of the players worked very hard and I am very proud of them.
"We have played better this season, but it is tough to have three games in seven days in this division. We could not rotate the players because we do not have the fit options, and for that reason we had four young players on the bench.
"The injuries have allowed young players like Rohan Ince and Jake Forster-Caskey to get many minutes on the pitch and they have helped us a lot in this situation."