Problem: Donnie Iris (born Dominic Ierace on February 28, 1943) is an American rock musician known for his work with the Jaggerz and Wild Cherry during the 1970s, and for his solo career beginning in the 1980s with his band, the Cruisers. He wrote the #2 Billboard hit, "The Rapper", with the Jaggerz in 1970 and was a member of Wild Cherry after the group had a #1 hit with "Play That Funky Music." He also achieved fame as a solo artist in the early 1980s with the #29 hit "Ah! Leah!"

Dominic Ierace was born in New Castle, Pennsylvania, but grew up in Ellwood City, Pennsylvania. The son of father Sam and mother Carrie Ierace, young Dominic began to learn how to sing at an early age from his mother, who had sung in Curly Venezie's orchestra. He practiced earlier on by singing along with his mother's favorite singers, Frank Sinatra and Tony Bennett. Per his mother's encouragement, Ierace began singing at weddings at age five, and by eight was performing on local television and entering talent contests. Over time, Ierace began to develop his own interests in music with the advent of rock music, drawing inspiration from Elvis Presley and Buddy Holly and later from the Beatles, the Rolling Stones and even R&B and soul artists Marvin Gaye and Ray Charles in addition to other Motown acts. The popularity of rock and roll inspired Ierace to become a self-taught guitarist. When his voice changed around age 12, he gave up singing and took up the drums. About the time he was a senior in high school (circa 1961), Ierace's voice changed again, and he got back into singing. He formed a vocal doo-wop group called the Fabutons with Johnny Roth, Anthony Matteo, Lou Delessandro and Chuckie Hasson and performed gigs around Beaver and Lawrence counties in Pennsylvania. However, the group only performed a few times before they disbanded and Ierace went to college. While attending Slippery Rock State College, Ierace formed a band called the Tri-Vels with guitarist Jim Evans and drummer Dave Amodie, two fellow students at Slippery Rock. With the addition of bassist Dave Reiser, they renamed themselves Donnie and the Donnells. This band in both incarnations played R&B and pop rock covers at fraternity parties and lasted from about 1961 to 1964.

Did any of the origial members leave the band?

Answer with quotes: However, the group only performed a few times before they disbanded and Ierace went to college.

Problem: Epstein was born to a secular Jewish family in New York City and raised in Brookline, Massachusetts. He attended Brookline High School (a 1991 graduate), and played baseball for the Brookline High School Warriors, but dreamed of working for the Red Sox. Epstein attended Yale University where he lived at Jonathan Edwards College. He served as sports editor of the Yale Daily News.

On October 12, 2011, Epstein agreed to a five-year contract worth $18.5 million with the Chicago Cubs. On October 19, 2011, it was reported that Epstein's official title with the Cubs would be President and that San Diego Padres general manager Jed Hoyer would take the GM position with the Cubs. On October 23, 2011, he took out a full-page ad in The Boston Globe, thanking Red Sox fans and the team's owners for their support. Two days later, the Cubs officially introduced Epstein as president of baseball operations. While the Red Sox were already a winning team when Epstein was hired in Boston, the Cubs were coming off a fifth-place finish in the National League Central and had a depleted farm system. The Cubs finished in last place in the National League Central for the first three years of Epstein's presidency, as the focus was to acquire young talent rather than maximize short-term competitiveness. After a three-year, top-to-bottom rebuild, the Cubs clinched a playoff berth in 2015; their first since 2008. They advanced to the National League Championship Series, where they were swept by the New York Mets. Epstein re-signed with the club on September 28, 2016, with a five-year contract estimated to be worth up to $25million. The Cubs finished the 2016 season with a 103-58 record, the best in the MLB and their best since the 1910 season. In the playoffs, they defeated the San Francisco Giants in the NLDS. The Cubs proceeded to beat the Los Angeles Dodgers in the NLCS, winning their first pennant since the 1945 season and sending them to the World Series. The Cubs then won their first World Series championship since 1908, when they defeated the Cleveland Indians in 7 games, breaking the so-called "Curse of the Billy Goat".

when did Theo join the Cubs?

Answer with quotes:
Two days later, the Cubs officially introduced Epstein as president of baseball operations.