Ahmed Hassan of Egypt has the record with 184 caps. According to Wikipedia through March 24, here are the most caps for active players who debuted with their national team less than 10 years ago. 1. Abdallah Deeb (Jordan): 117 caps in 9 years 69 days 2. Jalal Hosseini (Iran): 107 caps in 9 years 282 days 3. Shinji Okazaki (Japan): 106 caps in 8 years 37 days 4. Jozy Altidore (USA): 101 caps in 9 years 73 days
Unlikely, but you would think someone like Pulisic could maybe reach that mark if he 1.) avoids serious injury 2.) stays relevant in American football 3.) can play into the Dempsey timeline meaning he can play into his mid 30's. He has close to 10 caps now right at 18?
Gigi Buffon has 168 at present. If he carried on beyond the 2018 World Cup then he wouldn't be too far off.
He could break the record of 184 next year, but he would have to play in a significant amount of Euro 2020 qualifiers or Nations League games to reach 200. Italy has five WCQ Group Stage games left and possibly 2 playoff games. That could give Buffon 175 caps. Italy played 3 friendlies in 2014 before World Cup 2014. If Buffon played in 3 friendlies before World Cup 2018, he would need to play 6 World Cup games to reach 184 caps and 7 games to break 185. With the third place game, every Semifinalist plays 7 games.
It took him 4 years to play his last 32 internationals, so he'd really need to be going a fair while, potentially to 43. Probably unlikely.
The thing with Pulisic is he is something the US doesn't have in any capacity. Not saying someone similar won't come along, but it means he'll be needed for a longer time.