The Opening Day Roster

According to the scorebook for the Opening Day game, this was the Orioles roster at the start of the 1988 season:

Uniform #	Name	Position
1	Jeff Stone	OF
3	Bill Ripken	2B
6	Joe Orsulak	OF
7	Cal Ripken Sr	Manager
8	Cal Ripken Jr	SS
9	Jim Dwyer	OF
10	Terry Crowley	Batting Coach
11	Wade Rowdon	OF
12	Mike Morgan	P
15	Terry Kennedy	C
16	Scott McGregor	P
17	Pete Stanicek	IF-OF
18	Larry Sheets	OF
19	Fred Lynn	OF
21	Mark Thurmond	P
23	Oswaldo Peraza	P
24	Dave Schmidt	P
25	Rick Schu	IF
26	Carl Nichols	C
27	Lee Lacy	OF
28	Jim Traber	1B, OF
30	Keith Hughes	OF
31	Herm Starrette	Pitching Coach
32	Mark Williamson	P
33	Eddie Murray	1B
38	Ken Gerhart	OF
39	Doug Sisk	P
40	Minnie Mendoza	1st Base Coach
41	Don Aase	P
44	Ellie Hendricks	Bullpen Coach
47	John Hart	3rd Base Coach
48	Jose Bautista	P
49	Tom Niedenfuer	P
52	Mike Boddicker	P
58	Rene Gonzalez	IF

There's 29 players listed here but only 24* were actually on the Opening Day roster - I'm not sure who wasn't actually in uniform on April 4th.

*As a cost-cutting measure in the mid to late 1980's MLB teams usually only had 24 guys on their 25 man roster during the season.