What is this song about?

[IWEARGOGGLES]

It is kind of driving me crazy.

It is by Pedro the Lion and here are the lyrics:

"roll me over i wanna wave at the kids
i can't say i prescribe cause i don't know what it is
i'm down at the track i'm just calling to check in
if you start without me say my name as you begin
it's not like it wasn't all for you
but like evrything i do it's misunderstood
take a message i'm on my way out of town
but the wording's important so make sure you write it down
there's money behind every picture in the place
sincerely your husband on my way to the next race
if it's once i got it
if it's twice i don't"

I looked on song some meanings sites and everyone says it is about a problem gambler, which doesn't make sense.

I've always assumed that it was about a racecar driver or something similar.

Note: David Bazan usually doesn't have cryptic meanings in his lyrics, so it probably isn't impossible to figure out.