Yes that is a small track, but there are plenty of ball pythons that have them that have proved not to be het pied. The tracks mean almost diddly. My het pied has markers. A lot of het pieds have markers, but then again, there are a lot of het pieds that don't have markers.

But you never know until you breed it out. I read this once and I love it.

When in doubt, prove it out (or was it breed it out...oh well same thing)

You could always breed him to a pied or het pied (pied being preferred) and see what you get.