Sportwatch - Ricardo Chavira - Welcome to the Family
Privately, Ricardo Chavira owns a Casio Pro-Trek PAW1100-1V watch, but the watch in Welcome To The Family is slightly different. Most likely the watch is a Casio or Timex watch.
The watch in the series has around black case, with a chrome/silver colored 'bezel', and a rectangular digital screen which can light up (EL Backlight or Indiglo) as can be seen in the pilot episode and a promotional photo. The strap could be nylon.
As soon as we have better images, we'll try to find out what he wears. If you have a sugestion, contact Watch-ID here