Mejia returned July 12, appeared in seven games for New York, then was banned for 162 games on July 28 after a positive test for Stanozolol and Boldenone.
The Mets said they "were deeply disappointed." The Major League Baseball Players Association declined comment, and a spokesman for Mejia's agents said the pitcher had no comment.
Under pressure from Congress to toughen their drug program, major league players and teams agreed in November 2005 that a third positive test for PEDs would result in a lifetime ban.
Mejia may apply one year from now to baseball Commissioner Rob Manfred for reinstatement, and Manfred at his discretion has the power to let Mejia back in baseball — but no earlier than for the 2018 season. If an application is made and denied, Mejia could ask baseball's arbitrator to end the ban, claiming the penalty is without "just cause." The arbitrator cannot reduce the ban to less than two years.
Outfielder Josh Hamilton, then in the minor leagues, was suspended several times for drugs of abuse from 2003-05 but was allowed to return each time. During a time when there was not a drug agreement, Steve Howe was suspended for life by Commissioner Fay Vincent in 1992 after the pitcher's seventh drug- or alcohol-related incident. Arbitrator George Nicolau said doctors concluded Howe suffered from Attention Deficit Hyperactive Disorder and cut the suspension to time served, which was 119 days.
No players have been banned for life under the minor league drug program.
A Dominican signed by the Mets in 2007, Mejia reached the major leagues in 2010 and became their closer in 2014, when he had 28 saves in 31 chances. He is 9-14 with a 3.68 ERA in 18 starts and 95 relief appearances.
Mejia began last year as the Mets' closer, but couldn't get loose while warming up on opening day at Washington and went on the disabled list with elbow inflammation.
Because of the suspensions, Mejia received just $496,311 of his $2,595,000 salary last year. He will receive none of his $2.47 million salary this year.
In Mejia's absence, Jeurys Familia became New York's closer, and the Mets went on to reach the World Series for the first time since 2000. New York lost the World Series to Kansas City in five games.
The Associated Press