here are guidlines for position changes
Position Changes
Pos Notes
QB: No Restrictions
RB: No Restrictions
FB: Restricted
Weight restriction > 220 lbs
Speed restriction < 90
WR: No restrictions
TE: Restricted
Weight restriction > 220 lbs
Speed restriction < 90
OL: No restrictions
DT: Restricted
Weight restriction > 245 lbs
DE: Restricted
Weight restriction > 225 lbs
Speed Restriction < 90
OLB: Restricted
Weight restriction > 200 lbs
Speed Restriction < 92
MLB: Restricted
Weight restriction > 215 lbs
Speed restriction < 92
DB: No restrictions
RET: No restrictions