César David Puello Santana (born April 1, 1991) is a Dominican former professional baseball outfielder.

He spent the 2009 season with the rookie ball Kingsport Mets, slashing .296/.373/.423 with 5 home runs and 23 RBI.

[1] He spent the 2011 season with the High-A St. Lucie Mets, posting a batting line of .259/.313/.397 with career-highs in home runs (10) and RBI (50).

However, on April 6, the outright was retracted when Puello stated he was injured, and he was instead placed on the 10-day disabled list with a stress fracture in his back.

[6] On December 21, 2015, Puello signed a minor league contract with the New York Yankees organization that included an invitation to spring training.

[9] On December 1, 2016, Puello signed a minor league deal with the Texas Rangers organization that included an invitation to Spring Training.

[10][11] He played for the Round Rock Express of the Class AAA Pacific Coast League (PCL).

[19] On August 3, 2018, Puello signed a minor league deal with the San Francisco Giants organization.

[26] On February 11, 2020, Puello was signed to a minor league contract by the Boston Red Sox,[27] and was a invited to Spring Training as a non-roster invitee.

[28] On September 19, 2020, Puello was selected to Boston's active roster,[29] and he made his Red Sox debut that day against the New York Yankees.

[33] After struggling to a .158/.370/.184 batting line across 15 games for the Triple-A Worcester Red Sox, Puello was released on June 3, 2021.