A few decades ago, Cooper's injury was considered career ending. Not so now, and as Rodgers explained a few years ago, surgical techniques are constantly improving. That said, the stats are a bit sobering, especially for Cooper. From an AI summary:
A multi‑sport study found 72.4% returned to play again following torn Achilles tendon repairs.
A study of 676 NFL players found only 66.2% returned to play again.
Only 27.1% were perceived to have regained previous performance levels.
Players returning from torn Achilles repairs had significantly shorter overall careers, on average.
Among NFL players, running backs and linebackers showed worse results than players at other positions.
I was not able to determine how far back in time the NFL study went, or if it included many players injured before surgical repair techniques began to achieve successful results.
A multi‑sport study found 72.4% returned to play again following torn Achilles tendon repairs.
A study of 676 NFL players found only 66.2% returned to play again.
Only 27.1% were perceived to have regained previous performance levels.
Players returning from torn Achilles repairs had significantly shorter overall careers, on average.
Among NFL players, running backs and linebackers showed worse results than players at other positions.
I was not able to determine how far back in time the NFL study went, or if it included many players injured before surgical repair techniques began to achieve successful results.

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