Chicago Cubs

In 2004, Pinto was named the Cubs' minor league pitcher of the year, after going 11–8 with a Southern League-leading 2.92 ERA while pitching for the Double-A West Tenn Diamond Jaxx. He earned mid-season and post-season SL All-Star honors and was promoted to the Triple-A Iowa Cubs.

Florida Marlins

Pinto was acquired by Florida, along with pitchers Sergio Mitre and Ricky Nolasco, in the trade that sent outfielder Juan Pierre to the Chicago Cubs in 2005. In four scoreless innings for the Marlins in 2006, Pinto struck out three and allowed two hits before being optioned to the Triple-A Albuquerque Isotopes on May 30. He was called back up to the major leagues when the teams expanded to their 40-man rosters.

In 2007, Pinto made his mark in the Marlins bullpen being used as a very good situational lefty early in the season. He excelled against lefties and was difficult on righties with his improving changeup.

In 2008, Pinto stepped back into his situational lefty role, but he has been used many times as a multi-inning reliever and was even considered for a rotation spot during spring training. He has excelled during this season in all the roles he's been used in.

St. Louis Cardinals

On June 23, 2010, Pinto was released by the Florida Marlins after being designated for assignment and signed with the St. Louis Cardinals. On August 21, 2010, the Cardinals released him.

Fukuoka SoftBank Hawks

Pinto signed with the Fukuoka SoftBank Hawks of Nippon Professional Baseball for the 2012 season. He was released on April 11, 2012.

Diablos Rojos del Mexico

On April 18, 2014, Pinto signed with the Diablos Rojos del Mexico of the Mexican Baseball League. He was released on May 3, 2014.

Piratas de Campeche

On April 20, 2022, Pinto signed with the Piratas de Campeche of the Mexican League, after nearly 8 years out of professional baseball.^[1] He made 5 bullpen appearances and registered a 7.94 ERA. Pinto was released on May 9, 2022.