Yea, and we are talking about today.
More specifically, you were talking about Saudi league of today.
You really think the team that the represented USA in this year's Gold Cup (pretty much 90 percent MLS guys) could do what that squad of SA based players did?
OK, since you Saudi League defenders keep deflecting I had to look it up myself. Currently there are some Saudis here and there in Eastern Europe and 1 guy in the lower leagues of Portugal. But nobody in the top leagues, not even in Holland or Belgium. That's not surprising, after all Saudi Arabia haven't qualified from a World Cup group stage since 1994.
Apparently five years ago the Saudis loaned out 9 players to different La Liga clubs in a league initiative to get some European club experience.
LaLiga agree deal to sign nine Saudi Arabian players on loan
Read this news on OneFootball.

The most notable player involved is Salem Al-Dawsari, who has joined Villarreal having scored 28 goals in 161 games for Al-Hilal.
Villarreal have also signed a player for their second team.
Speaking about the arrival of their loan signing, Leganés said:
“With Yahia Al-Shehri’s arrival, the club has improved its squad and also gained visibility in the Arab world.”
Other players have joined Real Vallodolid, Rayo Vallecano, Levante, Numancia, and Sporting Gijon.
Al-Shehri never played a game for Leganes. Al-Dawsari had 1 appearance and no goals for the Yellow Submarine. Even Jozy Altidore scored a goal for Villarreal and he was a massive bust.