By FOX Sports Staff
The England international is in the midst of an unusual situation where he is no longer United's No. 1 striker following the arrival of Robin van Persie in the summer. The Dutchman has lived up to expectations with 18 goals in 23 Premier League games while Rooney's season has been mixed.
It was Rooney's brilliance which eased United to a 4-1 FA Cup fourth-round victory over Fulham but a series of bad penalty misses already this season has highlighted how inconsistent the ex-Everton forward has been in the current campaign.
Saturday's strike against Fulham was his 10th goal of the season and brought him to 191 in the club's all-time scoring charts. He remains in fourth behind Jack Rowley (211), Law (237) and Sir Bobby Charlton (249).
However, Law is confident the 27-year-old club talisman will score the goals he needs to challenge Charlton for the title of United's greatest ever goal scorer.
"When you see some players in and around the penalty box, you don't think they'll score," Law told Inside United.
"But, with Rooney, you never think that. We always dreaded playing against Jimmy Greaves when he was at Spurs because you knew that if he was in and around the area there was a fair chance he'd score a goal. And Rooney is in that category.
"Along the way, I obviously beat someone else's total [to get to 237] so it's something that is always going to happen in football. I was happy to beat someone else and it's inevitable that Rooney will beat mine.
"I said when he first joined the club that if he can steer clear of serious injuries, he'll be the record goal scorer for Manchester United, there's no doubt about that."
Rooney is also 19 goals shy of becoming United's all-time top scorer in the FA Cup. That title is currently held by Law, who notched up 34 strikes in the competition.