By Jack Gallagher Marcus Rashford has discussed his 100th Man Utd goal and admitted that the change in ‘energy’ at Old Trafford this season has contributed to his upturn in form. The wide forward had been on 98 club goals since early October, but added two in the last few days – firstly against FC Sheriff in the Europa League, and against West Ham on Sunday in the Premier League. Rashford’s stunning first half header proved not only to be his 100th for the club, but also the winner in a hotly contested affair at Old Trafford. Speaking after the game to Sky Sports about the century of goals, Ra…