Will Warren has a 3.77 xFIP in 108 innings this year and isn't a free agent until '31. Even Preller wouldn't turn this down for a reliever that'll be on another team next year.
Ryan Zeferjahn just closed out the Brewers with a 2 inning save. Since the beginning of July:
12.1 IP/2 BB/21 K
You've already got the Angels on the phone...