I wouldn't say "Autoland" to it but the 737's can do an "Automatic Flare/single channel flare" due to it's autopilot design. Even with A/P B engaged, the A/T recieves its inputs from FCC A and respective "A" radio altimeter, even if "B" channel is engaged. So if the A/T thinks it landing due to the erroneus RA input, very well possible to flare without any "Flare" FMA.
Pls correct, if my memory serves me wrong.