I had proposed that the McKinstry, Outman and Veirling outfield with OPS+ of 61, 59 and 48 was the worst for a very long time.
I did find that the 1996 Tigers had some troubles when Bobby Higginson was injured for several weeks in May. On May 25th that year (with Felipe Lira on the mound) Buddy Bell chose a starting outfield of Kimera Bartee, Duane Singleton and Melvin Nieves. Inexplicably, Singleton and Bartee batted first and second that day. Although Nieves had an acceptable OPS+ that year of 101, Bartee and Singleton were at 56 and 6, respectively. (Yes 6, that's not a typo). In that game, the Tigers also brought in Chad Curtis and Danny Bautista (OPS+ 87 and 82) off the bench - giving them 5-pack of dubious outfielders.
To give you a sense of what an OPS+ of 6 means, Singleton played in 18 games for the Tigers that year, and the Tigers went 0-18 in those games.
Michael