when I saw the article title, I had to admit my first thought was WTF is a 'blueshirt'
from the article:
...Bruce was a three-star recruit out of Knoxville in Tennessee’s Class of 2015, according to his Rivals profile. He had agreed to join the program as a blueshirt, which means he joined the program as a preferred walk-on that would later receive a scholarship that can be counted toward the following recruiting cycle’s scholarship count or whenever a scholarship slot opens up within the program....