Tatis played in 125 games for the Mets last season, hitting .282 with eight home runs and 48 RBIs in 340 at-bats. The signing of Tatis ends any chance of lefthanded-hitting Carlos Delgado's return to the Mets, which might have sent Murphy to the bench.
The Mets also signed righthander Josh Fogg to a minor-league contract, Newsday has confirmed. Fogg, 32, is 62-69, mostly as a starter. He has an ERA of 5.09 in nine seasons.
In 24 games with Colorado in 2009, mostly as a reliever, he was 0-2 with a 3.74 ERA in 452/3 innings, walking 20 and striking out 27.