"The Delivery," by Andrew Welsh-Huggins, in Mickey Finn, Volume 3, edited by Michael Bracken, Down and Out Books, 2022.
This is the fifth story by Welsh-Huggins to appear on this page, and the third about Mercury Carter. Mr. Carter is a deliveryman but he doesn't work for Fed Ex. He's the guy you call when someone else would like to get their hands on the package, and is willing to kill for it.
In that case the clients are an elderly couple and even before he reaches their house he has good reason to suspect the bad guys are waiting for him. There's several of them and Carter is just one relatively small guy. The kind people tend to underestimate.
It's a good suspense story, with one flaw in my opinion: the author gives Carter a convenient ability so unlikely it leans toward super power territory. I enjoyed it anyway.