Yeah, it is old!
While it's true if you have the best stuff, pro teams will find you, it's not always the case. Matt DeSalvo set Division-III on fire, breaking tons of records for pitchers. When he finished at Marietta College, he couldn't get anyone to draft him and had to sign as an undrafted free agent with the Yankees.
He only threw 88-89 as a RHP - not anything special for pro standards, but he could locate four pitches for strikes. He continued to put up solid numbers in the minors and made progress as he was promoted. Eventually he got his shot, starting against the Mariners and picking up a few big league appearances.
Two lessons to learn here:
1) Though Matt dominated D3, he wasn't on too many radars. His stuff wasn't good enough.
2) He persisted anyway and can now say that he pitched in the big leagues!