on kick returns which depth chart are your players besides the KR pulled from?

You really have three options, quite often a lot of your starters will play on STs , if you don't mind doing that, then its an easy decision. If you go to player search and search on your own team, it will rank your own players.
OR you can play your second string or a mix of both.
STs really is worth getting right though.

i know that part. i guess i wasn't clear are kick return/punt return players pulled from ST Blockers? cause i want different blockers for returns from fgs

FGs i just want a high pass block/str rating don't really care much about speed since they're not going anywhere

Returns i want blockers with as high a run block/str ratio as i can get that ALSO have good speed/accel ratio to stay with my KR

One word then: Overrides

that's what i was afraid of.....oh well lots of work ahead then lol