My next door neighbor has a lawn service mow his lawn.
I notice this last time they mowed, they made the dark/light stripes.

I read an interview with a pro ballfield greenskeeper once, and he
said that's done just by using a bar that leans the grass.

Is there something like this I can mount to my Dixon ZTR, or is this
for "pro" level only?

They use a very expensive Walker mower on my neighbor's lawn.