This app was mentioned in 2 comments, with an average of 2.00 upvotes
Check this out for (non-American) Football: https://play.google.com/store/apps/details?id=com.gmail.pbilton.footballscoreswatchmaker&fbclid=IwAR0gN935O9UlHc0pey0m97r7utv1NFpw7G0RTIIymLkohfH9aT96zz7w4E4
That's not my app so I don't know if it includes MLS.
At one point I was thinking about making an MLS watch face, but I never found a good data source, so I never moved forward on the project.
You might also want to check out this app: https://play.google.com/store/apps/details?id=com.gmail.pbilton.footballscoreswatchmaker
That's a paid app, but only .99 cents. However, please verify withe the developer that it has MLS info. He's a guy I've communicated with a little bit in the WatchMaker forum over on Google+.