Here's a revised version of your passage in a more polished novel format:
"That was insane!" a youthful voice bellowed inside the hospital room.
Wayne Rooney, who had just stepped in, raised a brow at the outburst. His gaze landed on David, who sat up in bed, looking elated. Amused, Rooney smiled. "Seeing you this happy, I'm guessing it's good news?"
David only nodded, still caught up in his thoughts. "Yeah, the doctors said—" He trailed off, his mind drifting back to what had unfolded just moments ago while he was watching the match.
He had been watching with a grin on his face, completely engrossed. Rooney had just bagged his second goal of the game, sealing a dominant 5–0 victory. David had always known his coach was a legend—he was Wayne Rooney, after all. But this? This was something else. After training and playing alongside him, David had started to grasp just how vast the gap truly was.
And then a realization struck him.