The inaugural season for the Diamondbacks began on March 31, 1998, with a home game against the Colorado Rockies. For the special occasion, Opening Day patches were worn on the side of the caps.
For all games, home and road, an inaugural season patch was worn on the left sleeves. This logo would remain almost unchanged until the complete overhaul in 2007, as the white text at the top was changed to "Arizona" the following season.
Innagural patch worn on all jerseys during the 1998 season.
The patch worn on all jerseys beginning in 1999, which remained unchanged until 2007.
The Diamondbacks' standard home uniform was a full-sleeved white jersey with purple pinstripes and "Diamondbacks" written across the chest. Numbers on the front and back were both purple with teal outlines (with an extra white outline on the back numbers), and player names were the reverse, teal with purple outlines.
The purple caps had replaced the original white/purple as the default home cap and were almost always worn with the standard home jersey. The Diamondbacks made a marked shift from tradition when they created a new logo to be used on their helmets, making them the only team to have completely different logos on their caps and helmets. This snake in the shape of a "D" would last only one year on the helmet, but it would become the logo for the road caps and helmets the following season.
Like many teams at the time, the Diamondbacks let their starting pitcher decide which uniform combination to wear for each game. The home alternates were plentiful and colorful, much to the dismay of uniform traditionalists. Perhaps the most glaring was the purple jersey. With "Arizona" written across the chest in teal with a white/copper/black drop shadow outline, it was ceratinly different from anything seen before. Front numbers were teal/white, back numbers were teal/copper/white, and player names were teal/white. Another unique aspect was the sleeve's teal/copper/black trim in a diamond pattern, mimicking that of the diamondback snake, as also seen in the primary logo. These jerseys were mostly paired at home with the purple caps.
This black and white image from newspaper microfilm is the only evidence I have of the purple jersey being worn with the white caps.
Another jersey worn occasionally at home was a sleeveless vest with purple undershirts. It featured the "A" logo on the left chest and had no numbers on the front. The back numbers and names were identical to the standard home jerseys, which the small exception that the manufacturer's logo, Russell, was placed on the back collar in addition to the right sleeves of the undershirts. When slight modifications were made to all jerseys in 2001, this was the only style that remained untouched through the end of the purple era in 2006.
There was no distinction with which cap to wear, as the vests were paired with all three available home caps.
I was always under the impression that the teal/purple caps had been completely phased out before the season and were never actually worn in a game. I recently came across these pitcures, only one of which is an action shot, and even then the whole cap cannot be seen. If anyone has any more information about these caps, I would love to find out!
Mainly a road alternate, the black jersey made at least one appearance for a home game, although these black and white pictures are the only evidence I have. It was worn with the black caps and helmets usually reserved for road games.
The standard road jersey was gray with purple pinstripes and "Arizona" across the chest. Similar to the home jerseys, none of the names and numbers had matching color schemes, as the front numbers were teal/purple, the back numbers were teal/white/purple, and the names were purple/white. For all road games (no matter which jersey was worn), the cap was the black/teal version, and the helmet was the same, except with a purple bill. Black socks, undershirts, and belts replaced the purple from home games.
The purple alternate jerseys were also worn on the road, though only during this season, and only one game that I know for sure. In following years, they would be only worn occasionally at home.
Somewhat regularly, black jerseys were worn during road games, featuring the "A" logo on the left chest. Similar to the purple jerseys, they had the diamond-pattern trim on the sleeves in a teal/copper/purple arrangement. Numbers on the back were teal/white, and names were purple/white.
During pre-game batting practice, the team wore black jerseys that were similar to their road alternate jerseys, with the main difference being an absence of sleeve trim. The jerseys were also made of a different material and had mesh holes for more breathability. Special BP hats were still a year away from being introduced, so regular game hats were worn.
Most teams have traditionally used their batting practice jerseys during Spring Training games, while others like the Cubs and Cardinals opt for their regular game jerseys. But the Diamondbacks were all about being different, so they decided to be the only team to wear their regular season alternate jerseys, opting for the purple variety for all exhibition games. They also wore the purple caps and helmets for all games, making Spring Training games the only time they were worn during road games with gray pants. If you ever see a picture with gray pants and a purple cap or helmet, you can be sure it is from a Spring Training game.
Note the socks in this picture. This is the only picture I have seen of black socks during Spring Training. All others have purple socks.
For drills during Spring Training and non-game situations, however, tradition was followed, and batting practice jerseys were worn.