LONDON - Williams co-founder Patrick Head says he is ending his involvement in Formula One.
The 65-year-old Head set up the team with Frank Williams in 1977. Williams went on to win nine constructors' championships and seven drivers' titles.
This season, however, the English team scored only five points. Head says he's leaving as director of engineering "to have a change of focus." He will instead work on the company's hybrid business.
Jenson Button, the 2009 world champion and former Williams driver, tweeted that Head "believed in me as a teenager & gave me a chance in F1."