Jake Marisnick
When Marisnick signed with the Angels in December, it marked his move to his 11th major league team, and his fourth in the calendar year. He became a free agent after the shortest possible stint with the Dodgers, who signed him to a major league deal for league minimum after he was DFA'ed by the Tigers, cleared waivers, and elected free agency instead of going back to Triple-A. He came off the Dodgers' bench a total of four times in July, going 2-for-5 at the plate, before going onto the 60-day IL with a hamstring strain.
No one would blame you if you forgot Marisnick was a Dodger at all. The two hits he got down were unremarkable, he didn't walk at all, and then he disappeared for the rest of the season and became a free agent again at the end of the year. He's currently at Angels spring training as a non-roster invitee, where he's actually hit pretty well over five games so far.
However, especially with the Dodgers' bench being as air-tight as it is now, there's less than zero reasons to miss Marisnick as a Dodger.
Amed Rosario
If we can be grateful to Rosario for anything, it's that he helped get Noah Syndergaard the hell out of LA. Just ahead of the trade deadline last year, the Guardians became the next (but not the last) in a long line of "I can fix him" candidates that wanted to take a flyer on Syndergaard (the Dodgers also had to sweeten the deal with cash), while sending Rosario the Dodgers in return. He played in less than 50 games as a stopgap at second base and was pretty okay. He hit .256/.301/.408 with three home runs and 18 RBI.
He also left in free agency at the end of the season, and with Mookie Betts permanently moving to second and Gavin Lux returning to shortstop, there was no reason to approach Rosario about a return to LA. Instead, he went to the Rays for one year and $1.5 million, where he'll presumably back up Brandon Lowe at second and Taylor Walls at shortstop.