Subject: sell or use as mid

hi guys i am a hardcore defender trainer. I have this player:
Fábián Kammerer, age: 25

very good stamina tragic keeper
formidable pace brilliant defender
solid technique good playmaker
solid passing poor striker

who is old enough to be removed from training. should i keep him as a mid-fielder or just sell him?

If you cant switch to pace training for some weeks, then it would be better if you sell him (he is in the exact age to get good money from him).

It can be usefull as defensive midfielder, but with the money you'll make from him you can buy a complete midfielder in a couple of weeks after the market prices fall down.

i am currently training pace! but have recently bought 2 new players..... 19 yr old and 20 yr old..... they will weaken my team but its more beneficial to train then rather than this guy.... isint it?
as such im not very worried abt weakening my team.... coz weak or not weak... in the top league i know i am going to loose all the matches against 5 other teams!
(edited)

ok, but every player that plays a match train pace... regardless of his position or match order. DEF, MIDs and ATTs train Pace, so you shouldnt need to chose between this guy and the youngsters: they'll all train if you give them minutes.

When you switch to defender skill, then yes: you'll have to choose. But it seems to me you still have some time.

ohhh ok.... thanks! :)