Getting the fouling player's number

[kentref]

One of the things I have the most trouble with is consistently getting a number of the fouling player on live ball fouls, where I need to keep following the play. Somewhat ironically, when I first started officiating I didn't have this problem. Instead, I tended to keep my focus on the fouling player until I definitely got his number. Trouble was, I sometimes missed several seconds of action as the play was continuing. Now, I have overcompensated to make sure I'm following the rest of the play.

What techniques do you guys use to help see/remember a fouling player's number, while continuing to follow the play?