This past week the Detroit Pistons made the decision to let Notre Dame alum Monty Williams go while still owing him $65 million for the remaining years of his contract.  Williams made $7.9 million during his NBA playing career.  
 Add on his years as a NBA coach -- with three head coaching stints in New Orleans, Phoenix and Detroit -- Monty did quite well.
NBA head coaching salaries are rarely made public.  Monty was a head coach for nine seasons, before signing his huge contract with the Pistons.  Let's assume that Williams made on average $4 million per year (conservative assumption) over those nine seasons as a head coach and $500,000 per season (conservative assumption) during his 7 seasons as an NBA assistant coach.   This would total $39.5 million.
Williams' Detroit Pistons contract totaled $78.5 million -- add up all of his compensation in professional sports and you have:  $125,900,000 -- which places him FIRST on the all-time list of former Notre Dame student-athletes:
- Monty Williams:  $125,900,000 
- Harrison Smith:  $122,735,243 -- not guaranteed, contract to 2026  
- Quenton Nelson:  $118,010,393 -- not guaranteed, contract to 2026
- Mike McGlinchey:  $116,981,966 -- not guaranteed, contract to 2026
- Jeff Samardzija:  $116,341,666
 
- Zack Martin:  $113,240,531 -- not guaranteed, contract to 2025
- Ronnie Stanley:  $108,645,183 -- not guaranteed, contract to 2024
 
- AJ Pollock:  $78,498,337
- Anders Lee:  $66,044,038 -- guaranteed contract to 2025 
 
- Troy Murphy:  $66,000,000  
- Kyle Rudolph:  $59,936,853 
- Cole Kmet:  $59,161,763 -- not guaranteed, contract to 2027
 
- Golden Tate:  $56,421,672 
 
- Stephon Tuitt:  $55,710,551 
 
- Brad Lidge:  $55,335,000 
- Pat Connaughton:  $50,727,479 -- guaranteed contract to 2026
 
- Kyle Palmieri:  $50,192,154 -- guaranteed contract to 2025 
 
- Bryan Rust:  $46,670,000 -- guaranteed contract to 2028 
- Bryant Young:  $44,000,000 
- Justin Tuck:  $43,248,463 
- Romeo Okwara:  $36,855,601 
 
- John Sullivan:  $35,800,027
- Jerome Bettis:  $35,122,500
- Jeff Faine:  $34,456,892 
- Will Fuller:  $34,246,582 
 
- Jaylon Smith:  $33,316,297 -- free agent
- Joe Alt:  $33,160,944 -- guaranteed contract to 2027 
 
- Ian Cole:  $31,949,694 -- free agent
- Matt Carroll:  $29,537,032 
- Tim Brown:  $28,432,686
- Laphonso Ellis:  $27,939,000
- Rocket Ismail:  $27,885,021 
 
- Tyler Eifert:  $26,310,317 
 
- Joe Montana:  $26,000,000 
- Nick Martin:  $25,185,579 -- free agent 
 
- Steve Beuerlein:  $22,238,265