That article couldn't be more misleading. Sartori basically knows the CBA inside and out. That's it.
He did not "develop" software while working for the MLB. He was part of the team that hired a firm to build them EBIS which is, by all accounts, a gigantic turd sandwich.
Sheehan is a f***ing botanist from a 2 bit college in Ohio. If he's the only one actually doing stats for your baseball team, you're f***ed.