Although an initial ID leaned toward Cooper's or Sharpie, we are thinking it's a Merlin. (We are also well aware that IDs of perched raptors can be challenging.)
Anyone else? (Thanks, Ron!)
Ron also took the photo of a Rusty Blackbird (below) at the same location on Sunday morning.
More on Merlins here.
More on Rusty Blackbirds here.