There's an old saying in hockey that “you can't win a game in the first period, but you can lose a game in the first”. From a zero-sum perspective, this doesn't make any sense, yet I've applied this word structure to jerseys:
Shoulder patches can't make a good jersey great, but it can make an otherwise good jersey bad.
Look no further than the two most-recent franchises. Vegas designed a solid patch for their primary jerseys. Yet, it isn't enough to consider this a great jersey.
On the other hand, Seattle had something brewing with their unique colors and a decent primary logo. Sadly they decided to add the most-overused object in logo history with the anchor. If there was any hope left, they botched the execution, forcing me to call this a bad jersey.
That said, let's review the essential attributes for a complimentary shoulder patch.
Presence
Many iconic jerseys have no shoulder patch—and that's fine. Jerseys that are going for a clean, simplistic look should be wary to introduce something that can be detrimental. Take the Maple Leafs as an example. Maybe the most iconic hockey jersey of all time. They've experimented with shoulder patches, with no success.
Another aspect to consider is what kind of striping / pattern you have on the shoulder. Any jersey that keeps the shoulders free should first consider no patch, as sizing and fit become harder to perfect.
Likewise, jerseys that have a different color on the shoulders should default to having a patch. This is why the one team I think should immediately consider a patch are the Oilers.
Size
In the 80s shoulder patches were comically small.
In the 90s they went jumbo.
Since the mid-2000s we've sort of settled somewhere in between.
We should situationaly explore sizes closer to the 90s, with the option to size down. Shoulder pads are no longer getting bigger, but the players are, meaning the patch to jersey ratio is inching closer to what we had in the 80s. No bueno.
Fidelity
This attribute is very much tied to the main logo. While both logos can be simple, they both should not be complex.
Most successful jerseys opt for the balanced approach. If the main logo is detailed and/or has copy, the shoulder patch will be more simple, with no copy. And vice versa.
Shape
Circular patches are easy. They require limited creativity, and are guaranteed to fit on the shoulder.
Yet they come off as unnatural, forgettable, and...what were we talking about again?
What ends up working well are logos that are close to being circular, but still have their own unique shape.
The high-risk, high-reward strategy is to stray further from a circle, while not making it look like a complete mess. Better to have popouts making the patch taller rather than wider. For two reasons: one, this isn't football, and two, there is just more surface area that doesn't force warping.
The low-risk, low-reward strategy is to have most of the patch actually be a circle, with a small popout or two.
Color
I've only seen one patch rock a color that is nowhere else on the jersey, and that's the Bs with their “Pooh Bear”.
Suffice to say, you really shouldn't try this unless it smacks you in the face.
Relationship to main logo
The best shoulder patches should, of course, relate to the main logo. Whether it's adding to the story, or just reinforcing a point, the theme should be the same. This sentiment aligns well with my section on Fidelity.
What the shoulder patch should not be is a duplicate of the main logo, or the main logo from a past generation. This doesn't “add” anything.
Faux pas
Number on the shoulder
Football doesn't have the luxury of a full sleeve and yet some of their best jerseys still found a way to have their “patch” (really just a logo) on the shoulder.
So for the NHL there is no excuse to go off script. Outdoor game jerseys can get a pass I guess, but don't be the Panthers, who continue to find ways to ruin their jersey.
Unbalanced shoulders
We see one single patch when a team is paying homage, like to their home country or to a team's anniversary. I'll admit, I was OK with the idea of this for years. But one day something triggered me to say “why” and I've never gotten a good answer.
If you have two different patches (like Calgary above), choose one. I'm all for representation, but there's only so much a jersey should convey. You can't be that desperate for representation if your next jersey has zero patches.
If a patch doesn't work for both shoulders, then consider putting it on the right chest, which has been home to many legendary patches.
A note on my “bias”
For those of you who think nostalgia has blurred my view on jersey design, leading to a bias for the late-80s to early-2000s:
1. Read this quote from Paul Lukas.
Because old uniforms were designed to answer the question, ‘What looks good on the field/court/ice?,’ while new uniforms are designed to answer the question, ‘What will 18- to 34-year-olds want to buy?’ Simple as that.
2. Look at these jersey comparisons
If you still think I'm biased then I can't really help you.