Trout, entering his third year with the Angels, has finished second in the voting for American League Most Valuable Player in each of his first two seasons.
The one-year deal will allow the team time to negotiate what will likely be a lucrative, long-term contract with the 22-year-old standout following the end of the upcoming season.
Under MLB's collective bargaining agreement, teams can pay players with three years or less of major league experience whatever they wish.
Trout and the Angels are discussing a six-year, $150 million extension, the Los Angeles Times reported.
The outfielder batted .323 with 27 homers, 97 RBI and 110 walks over 157 games last season.
The previous year, he was named AL Rookie of the Year, batting .326 with 30 homers, 83 RBI and 49 stolen bases.
Senate Democrats to pull all-nighter on climate change
Jessica Simpson shares three-way kiss with friends in photo