Since I have been a fan, there have been several players with huge expectations in the Red Sox minor league system. Some of these players, such as Mo Vaughn, Nomar Garciaparra, Trot Nixon, Jon Lester, and others meet those expectations. Others are not as fortunate.
Brian Rose was part of a trio of hot pitching prospects for the Red Sox in the mid to late 1990's. He is the only one who did not develop into a longtime starter, though none of the three really lived up to expectations. Jeff Suppan and Carl Pavano have both had long careers, but Rose was supposed to be the best of the three of them.
Rose was drafted in the third round of the 1994 draft, the same draft that produced Nomar Garciaparra. He made a quick impact and won 12 games during the 1996 season for AA Trenton. He then won 17 games and had a 3.02 ERA and 116 strikeouts for Pawtucket in 1997. He made his Major League debut in 1997 in one game of a doubleheader and gave up four runs in three innings, striking out three and walking none.
In 1998, he was 1-4 with a 6.93 ERA, proving he was not ready yet. But he was still 22. In 1999, he was 7-6 with a 4.87 ERA, but only 51 strikeouts in 98 innings. It was this low strikeout rate that probably lead to the devaluation of Rose as a prospect.
In 2000, he started out 3-5 with a 6.11 ERA with 24 strikeouts in 53 innings and quickly lost favor with the Red Sox. He was part of a package including Jeff Frye, John Wasdin, Jeff Taglienti and cash that was sent to the Colorado Rockies for Rolando Arrojo, Mike Lansing, and Rich Croushore. Neither side really got much out of this trade.
Rose pitched poorly for Colorado in 2000 and then bounced from the Mets to the Devil Rays in 2001. He never made the majors again and jumped from team to team.