The rr.com article says 15 sch + 7 wo = 22 freshmen.
Here's a cut and paste of the text:
The Tech freshmen class, including 15 scholarship players and seven walk-ons, checked into their temporary accommodations Friday. After physicals and other administrative procedures, they will practice for the first time Saturday at 5:45 p.m. at Rose Bowl Field. There is no practice schedule for Sunday, but the freshmen will work out at 9:30 a.m. and 5:45 p.m. Monday.
Am i misunderstanding the question here, or is there just better info now after the fact?