NHL 12
45 Achievements
1,000
Team Doctor
Use a Healing card to heal an injured player in Hockey Ultimate Team
10
How to unlock the Team Doctor achievement in NHL 12 - Definitive Guide
Then you have two options to get the achievement:
1. Check the consumables in your collection. If their is a healing card that matches with the injury of the player then spend it on the player and you get the achievement.
2. If you don't have one then go to the trading section and search for healing cards. If you have found the right card, buy it and spend it on your injured player. Achievement unlocked.
Update: If you want to get your own player injured you can start a match against the AI and then miss hits so that you run into the boards. Sometimes your player will be injured when he runs into the boards.
In your consumables pile, you NEED to have a healing card for either an arm/leg injury or the all injury card. Most healing cards will range in health with most being at 2 games. If you cannot have a player get injured in a HUT game, then choose one player and keep crashing him into the boards as eventually he will get injured. For example, if your player has a 2 game arm injury, then apply the 2 game arm healing card to the player bringing his health back to normal and the trophy is yours.
If one of your players gets injured, there will be a certain number of games you have to play before they can come back into the lineup. In order to get this achievement, you must use a healing card that will heal your player to 0 games. For example, if you get a 2 game leg injury you must apply a 2 game or higher healing card to get the number to 0. An easy way to injure your player on purpose is to play against the AI and just miss hits running into the boards.