MLB's free-agent class got a lot more interesting Friday. Right-hander Michael King went back on the market while starters Sonny Gray and Nick Martinez also became free agents after their teams declined mutual options.

They were among 14 new free agents Friday, bringing the total to 155 in the two days since the World Series ended. About 40 more players could join them by Monday, the deadline for decisions on options.

King, 31, is a free agent for the second straight winter. He turned down a $28 million player option and took a $5 million buyout instead. He went 12-10 with a 3.21 ERA in 32 starts.

Gray and Martinez available

Boston declined a $30 million option on Gray, who turns 37 next week. He will get a $5 million buyout paid in five $1 million installments. Gray tied for the major league lead with 18 wins and posted a 2.72 ERA, his best in a full season.

American League champion Tampa Bay passed on a $20 million mutual option on Martinez and will pay a $4 million buyout. The 36-year-old set a career high with 15 wins, made his first All-Star team and started Game 1 of the World Series. The Rays also declined outfielder Cedric Mullins' option.

Alcantara stays in Miami

Not everyone got to test the market. The Marlins exercised Sandy Alcantara's $21 million option rather than pay a $2 million buyout. The 31-year-old went 13-11 with a 3.87 ERA in his second season back from Tommy John surgery.

Dustin May, who started Game 4 of the World Series for champion Milwaukee, declined his $20 million mutual option and took a $500,000 buyout.

More names on the board

The Cubs saw left-hander Matt Boyd and catcher Carson Kelly decline mutual options. Minnesota declined first baseman Josh Bell's option. The Athletics passed on infielder Jeff McNeil and left-hander Jeffrey Springs.

Meanwhile Bo Bichette chose to stay put. He exercised his $42 million player option to remain with the New York Mets.