Chargers defensive tackle Sebastian Joseph-Day (69), a former Ram, celebrates after sacking the Rams’ Baker Mayfield (17).

Source: https://www.latimes.com/sports/chargers/story/2023-01-01/chargers-late-season-surge-super-impressive-in-blowout-win-over-rams

Shortly after Snead spoke, the NFL gave the Rams 4 choices to compensate for the 2022 departures of offensive lineman Austin Corbett, defensive lineman Sebastian Joseph-Day, operating backs Von Miller and Obo Okoronkwo and cornerback Darious Williams.

Source: https://basquiatstrings.co.uk/the-rams-committed-to-matthew-stafford-but-salary-cap-issues-remain-a-big-issue-bt-news

Three plays later, defensive lineman Sebastian Joseph-Day was called for roughing the passer on a third-and-six incompletion.

Source: https://www.latimes.com/sports/chargers/story/2023-09-18/chargers-titans-takeaways-joey-bosa-two-sacks-improved-rush

We saw an example of that player-to-player recruitment Thursday night on Twitter, with Chargers defensive lineman Sebastian Joseph-Day pitching Devin McCourty to sign with Los Angeles.

Source: https://nesn.com/2023/03/stephon-gilmore-reveals-patrick-mahomes-tried-to-recruit-him/