Randy Johnson had a fairly simple free-agent wish list. The San Francisco Giants badly wanted a pitcher with the Big Unit’s talent and experience and could meet those requests.

Johnson and the Giants agreed to an $8 million, one-year contract Friday, meaning the 45-year-old pitcher will go for his 300th win with a new team — and back home in the Bay Area to boot.

Johnson, a 21-year big league veteran who spent the past two seasons with the Arizona Diamondbacks, was born in Walnut Creek, Calif., about 30 minutes from the Giants’ waterfront ballpark. He grew up in nearby Livermore.

‘‘This will give him a chance to reconnect with some of his old friends,’’ Johnson’s agent, Barry Meister, said in a telephone interview.

The five-time Cy Young Award winner has 295 victories after going 11-10 with a 3.91 ERA in 30 starts last season. He can earn an additional $5 million in performance bonuses.