MADDEN PHYSICAL REGRESSION FOR PLAYERS 29 AND UP

They will usually start to drop around 28 yrs of age.

Various articles on Internet describing such.

Dan has an excellent article describing this if you have not already looked at it.

Here is the link:

http://www.deepdivegaming.com/all/2016/9/24/how-your-players-regress-in-madden-17