|Chicago Cubs — No. 55|
|Born: March 9, 1979|
|Bats: Switch||Throws: Right|
|September 5, 2003 for the Los Angeles Dodgers|
|Runs batted in||66|
Hill made his long awaited debut in the Majors in with the Los Angeles Dodgers. However, at the time, all-star catcher Paul Lo Duca was cemented as the Dodgers catcher, making Hill expendable. On July 31, , Hill was one of the most prominent names in a trade, going from the Dodgers to the Arizona Diamondbacks for veteran Steve Finley. He would go on to hit .250 with 1 home run and 6 RBI in 2004 before breaking his ankle in a collision at home plate.
In , Hill began the season as the starting catcher for the Diamondbacks. His offense, however, did not perform at the level expected, as he would spend the majority of the year platooning with backup catcher Chris Snyder. Having played in only 34 games in 2005, many in the MLB community felt as though Diamondbacks manager Bob Melvin did not give Hill ample time to develop.
Koyie entered the Diamondbacks spring training locked in a battle with Snyder for the backup role to Johnny Estrada, a major off-season acquisition of the Diamondbacks. Although Hill compiled an impressive spring camp (15-30 for a .500 batting average), on April 2, Hill was designated for assignment. On April 6, the Yankees picked him up on waivers only to designate him for assignment on April 14, 2006. On April 17, he accepted an assignment to the Yankees' Triple-A team, the Columbus Clippers. Once the 2006 season concluded, Hill was released from the Yankees organization. On November 16, 2006, Hill signed a minor league contract with the Chicago Cubs.
On June 1, , Hill was called up to replace the injured Henry Blanco. Hill saw action later that day as he was put in to the game in the top of the sixth inning after Michael Barrett was taken out of the game after Barrett scuffled with teammate Carlos Zambrano.
On August 20, 2007, Hill was designated for assignment. The Cubs signed Hill to a minor league contract in the 2007 off-season with the intent to compete with Henry Blanco for the backup catcher role in spring training.
On September 1, , Hill's contract was purchased by the Chicago Cubs and he was called up to the expanded 40-man roster.
Following an injury to Geovany Soto on July 7, , Hill became the Cubs' starting catcher; as of August 1, he caught all but two-thirds of an inning of the Cubs' 21 games during that period.
On October 16, 2007, he was using a table saw to cut wood for a window frame. Part of the wood got caught in the saw, and the saw grabbed and his hand was in the way. The saw severed his thumb and severely cut into the other 4 fingers into his hand. He saved them long enough to re-attach the fingers to his hand, and after many months of therapy, was able to regain motion in his fingers.