While walking thru the casino there's a big commotion at a row of video poker games. A player is all upset screaming "I made a mistake!"

The way the player tells it:

He was dealt various cards including Jd and 10d and three unsuited small cards. He only held the Jack of diamonds.

After the draw he got a straight with these cards reading left to right on the screen:

Jd Ad 10c Kd Qd

He thinks if he held the 10d he would have had a royal. But others were telling him that if he held the 10d the Qd or the Ad would not have been drawn.

What's the answer?