True but only 7 penalties as a rookie for Tyron compared to 13 for Tyler. Why? I believe because of their slight difference in athleticism. See the RAS scores of both below...
As you can see, Tyron is bigger/taller, yet faster, quicker and more athletic, hence why the lesser amount of penalties. Tyler is a very good player, but since he is slightly slower, less quick and slightly less athletic than Tyron, it would most likely be best for Tyler to play inside at Guard.
Being moved to Left Guard to start the season and watching how he performs there will be very telling.