David Ferrucci lead the team who built the Watson research system that won at Jeopardy. He left for Bridgewater in 2014, before the IBM Watson unit was created,

David Ferrucci lead the team who built the Watson research system that won at Jeopardy. He left for Bridgewater in 2014, before the IBM Watson unit was created, and way before Dalio came back to run Bridgewater.