Entering a Distance

I'm building a mobile form to capture a golf scorecard. There's inherently repetition there (either 9 or 18 holes). Currently the user enters the par via a segment button and the distance via an empty text field. The segment button is quite easy and efficient, but the text field is rather cumbersome.

Any ideas on an efficient (both easy and accurate) way of entering a distance? Perhaps a slider or some other interaction element? Screen grab below for context...