In addition to the normal way to unlock a card, some cards require a specific task to be completed.

Card 2: Earn a Gold in the All-Madden Chase and Tackle drill.
Card 30: Earn a Gold in the All-Madden Coffin Corner drill.
Card 38: Earn a Gold in the All-Madden Ground Attack drill.
Card 42: Earn a Gold in the All-Madden Precision Passing drill.
Card 52: Earn a Gold in the All-Madden Swat Ball drill.
Card 99: Earn a Gold in the All-Madden Trench Fight drill.
Card 104: Earn a Gold in the All-Madden Clutch Kicking drill.
Card 147: Earn a Gold in the All-Madden Pocket Presence drill.
Card 195: Earn a Gold in the Ground Attack drill.
Card 197: Earn a Gold in the Clutch Kicking drill.
Card 199: Earn a Gold in the Swat Ball drill.
Card 208: Earn a Gold in the Pocket Presence drill.
Card 209: Earn a Gold in the Trench Fight drill.
Card 210: Earn a Gold in the Precision Passing drill.
Card 211: Earn a Gold in the Coffin Corner drill.