Here are the guys who had 56 or more BBs in 2005 followed by their 2006 totals
Beltran (95)
Jenkins (56)
Vizquel (56)
F. Lopez (81)
C. Lee (58)
Burnitz (22) only had 300ABs
Peralta (56)
Eckstein (31) in 35 less Games
Young (48) -
Chavez (84)
Bill Mueller (17) played only 32 games
Mauer (79)
Lugo (39) 200 less PA's than 05
Guerrero (50)
Furcal (73)
Varitek (46) in 30 less games
Green (46)
Matsui - injured almost all season
Martinez (71)
Inge (43)
Floyd (29) down 53 games
M. Cabrera (86)
Figgins (65)
Giles (62)
A. Jones (82)
Castillo (56)
Posada (64)
Roberts (55)
Utley (63)
Lawton - played in 11 games last yr
Ibanez (65)
Wright (66)
Teixeira (89)
Delgado (74)
Kent (55) in 30 less games
Zaun (41) in 35 less games
Klesko missed entire season with injury
Dellucci (28) 200 less PAs, used as a backup
Jeter (69)
Overbay (55)
Gonzalez (69)
Sheffield missed all but 2 months of season
Counsell (31) in 200 less ABs
Hafner (100)
Johnson (110)
Ramirez (100)
Konerko (60)
Wilkerson (37) missed 60 games due to injury
Glaus (86)
Ensberg (101)
Lee missed most of season with wrist injury
Sexson (64)
Berkman (98)
ARod (90)
Edmonds (53) down 32 games from 05
Ortiz (119)
Bay (102)
Pujols (92)
Burrell (98)
Helton (91)
Giambi (110)
Dunn (112)
Abreu (124)
Giles (104)
Of the 64 players above, all but 3 players were at or above 50BBs in 2006, were injured and missed a significant portion of time, or were relegated to backup duty. Here are the three that dropped.
For analysis, here is Melky's BB rate. 10.9% (BB rate is BB's/PA's)
Michael Young - TONS of PA's. His BB average in 2005 was 7.9%. His 2006 average was 6.5%. Career high BB rate is still 3% lower than Melky's rookie yr.
Brandon Inge - in 2005, he had 30 more BBs than he did in his previous career high BB total. 2005 was his 5th yr in the league. His BB rate was 9.2% in 2005. His BB rate in 2005 was 7.4%. His career high BB rate is still a whole 1.7% lower overall than Melky's.
Shawn Green - Green was on a major downswing in his career. His 2005 numbers were on a consistent slide from a career high of 93BB in 2002. His 2005 BB% was 9.6%. His 2006 BB% was 7.8%. This is consistent with the slide he was on. 2004 numbers were 10.7%. Consistent slide because he wasnt that good anymore, so he was being pitched to.
Overall, 46 players surpassed 50. 49 players on the above list played a full season. Hence, the chances are 94% that he would surpass 50BB's if given a full season. I would say that passing 50BBs is not a fluke, especially since he is a rookie.