Paul Mariner is tasked with slowing down Liverpool FC on Saturday, but that doesn't mean he isn't averse to sharing a few pointers with a fellow English No. 9.

Andy Carroll's future with the Reds may be in doubt – rumors have been swirling about his future under Brendan Rodgers, with a return to Newcastle gaining the most momentum – but Mariner didn't hold back when asked what advice he would give the 23-year-old striker.

A former England international and target forward back in his day, Mariner drew on his own experiences to identify a weak point in Carroll's game.

“I learned from a very early age that if you want to be successful at the highest level, you’ve got to be very consistent and you’ve got to have tremendous movement," Mariner told MLSsoccer.com. "In the old days, when defenders could come through the back of you, if you stood still, you were absolutely stupid because you wouldn’t last two minutes on the football pitch. You had to be constantly on the move.”

And how would Mariner apply that lesson with Carroll? As it turns out, with a little help from US national team coach Jurgen Klinsmann.

“Andy's an unbelievably imposing figure. He can strike fear in any defense. The one bit of advice that I would give Andy is that when he’s in the box I’ve noticed he’s just a bit static," Mariner said. "He’s got such tremendous ability. One of the greatest players that I saw in the modern era was Klinsmann. Klinnsman in the box was unbelievable.

"I remember one of the first goals he scored against Sheffield Wednesday. He basically made a step in front of the defender, then stepped out, the ball was delivered and all of a sudden it was in the back of the net. I’m only talking about a yard or half a yard, not massive distances. You’ve just got to unsettle the defenders when the ball is coming into the box. If Andy was to do that, then he’s very difficult to stop.”

Of course, Toronto FC fans will hope Carroll doesn't heed that advice come Saturday afternoon.