Chris Wood has been in fine form for Leeds United this season.
The 25-year-old striker has been in fine form for Leeds this season and has played a huge role as to why United find themselves sixth in the Championship.
The New Zealand international has netted 13 times in all competitions so far, with 10 of those coming in the league. In fact, he has scored nearly half of the Whites' goals in the Championship so far which pretty much sums up his importance.
It could and probably would be a disaster if Wood was to get injured, with the big hitman starting 19 of the Yorkshire club's 20 league games so far.
Summer signing Marcus Antonsson has looked okay at times but there is a big question mark over his goalscoring, whereas Souleymane Doukara probably cannot be relied upon to fill the void left by Wood either.
And Gray admits to the club's television channel that an injury to Wood would be his "biggest worry".
He told LUTV: "We would probably be a little bit worried just now if the centre-forward got injured for a long period of time. That would be the biggest worry."
Manager Garry Monk definitely needs another option up front in the event that Wood tires or gets injured.
Leeds' promotion bid very much hinges on goals at the minute, and a dearth of those could derail their hopes of reaching the Premier League.