While it's been a challenging year for golf at TCU (men are ranked 85th, women 66th), I'm not sure if TCU has ever had 5 players among the top 300 pros (OWGR). That's the current situation:
55 - Hoge
234 - Barjon
269 - Brun
271 - Springer
294 - Ravetto
Might not be long before Celli joins...