Free agent pickup Mike Moustakas drove in four runs, teaming with fellow newcomers Shogo Akiyama and Nick Castellanos, in Cincinnati's win over Detroit.
Free agents Moustakas and Castellanos each got $64 million as cornerstones of the Reds' rebuild. They combined to produce Cincinnati's first three runs, and Moustakas added a two-run homer to get the Reds off and running.
Akiyama, signed as a free agent, singled home a run in his first at-bat as a pinch hitter. Joey Votto added a solo homer.
Sonny Gray (1-0) fanned nine and gave up three hits in six innings. He extended his major league record to 34 consecutive starts without allowing more than six hits.
Matthew Boyd (0-1) needed 26 pitches to get the first out and 30 overall in the first inning. He lasted five innings and gave up four runs on six hits.
C.J. Cron homered for Detroit.