Thats according to former Liverpool striker Stan Collymore, who feels Rashfords inability to hold down a consistent position is holding his career back.
The 21-year-old was expected to lead the line for Manchester United following Romelu Lukakus departure.
However, hes been used in both a central position and from the left flank so far this term and has scored just two goals in his last 12 appearances.
Walcott spent his Arsenal career playing as a wide forward but was adamant his best position was through the middle.
And Collymore believes Rashford is in danger of repeating Walcotts mistakes at Old Trafford.
If Marcus Rashford isnt careful then, sooner rather than later, he is going to find himself cast as the modern-day Theo Walcott, said Collymore.
Someone who isnt seen as an out-and-out winger or straight-up No.9 but a Jack of all trades as a forward and master of none.
Thats why now is the perfect time for him to decide whether thats the way he wants to go. Or would he rather be a player who lives or dies as a No.9.
If hes happy to play anywhere if it means being an England regular then thats his call.
But if that is the case over the next five to 10 years then I worry about the negative impact such a decision could have on his club career because of the message it sends.