Sorry to those who'll see this on the retrosheet group, too. Jay Bruce
of the Reds reached base safely in his first 6 plate appearances in the
majors; I believe the following to be the longest such streaks over the
last 50 years:

7-Ted Cox, BOS AL, 1977 (6-for-6, 1BB).
6-Jay Bruce, CIN NL, 2008 (3-for-3, 3BB).
5-John Paciorek, HOU NL, 1963 (3-for-3, 2BB).
5-Dave Robinson, SD NL, 1970 (2-for-2, 3BB).
5-Bob Dernier, PHI NL, 1980 (4-for-4, 1BB).
5-Tom Dunbar, TEX AL, 1983 (2-for-2, 3BB).
5-Jose Hernandez, TEX AL, 1991 (4-for-4, 1BB).
5-Mike Piazza, LA NL, 1992 (4-for-4, 1BB).
5-Ramon Martinez, SF NL, 1998 (3-for-3, 2BB).
5-Kazuo Matsui, NYM NL, 2004 (3-for-3, 2BB).
5-Kosuke Fukudome, CHI NL, 2008 (3-for-3, 2BB).
5-Brandon Boggs, TEX AL, 2008 (4-for-4, 1BB).

Trent McCotter