I hunt a lot of baseball fields. I've found more stuff, including rings and pendants, between the baselines and the fence, from maybe 10 yards past the dugout entrance, inwards towards Homeplate. Behind home plate, all the way back to the fence.
Outside the fence, obviously beep the bleacher areas, but also the swathe from the dugout to the outfield fence. I've scouted many of the ballfields when games were happening, to see where people group up, and lots of people avoid the bleachers and bring their own chairs and sit along the sides of the outfield.
I've found that outside of the outfield (not the sides, but the "back" of the outfield) can have stuff to find, too. Mostly in the smaller fields, where getting donked by homeruns is unlikely. There are baseball complexes around me that have 8-10-12 fields of all sizes, and people walk all over the place, so anything can be anywhere.
If there are complexes that are completely fenced around the perimeter with walk-through gates from the parking areas, definitely beep all of the grass strips around the parking area, through the gate, and along the interior fences. I've found more rings along fences than in the middle of areas. My best gold and diamond ring was inches from the fence and within 10 feet of one of those pass-through gates. Two weekends ago, I found a small (5g) 14k wedding band situated just like that at a different complex.
And a word about beeping sports complexes here. If you can see a chain link fence...heck, if you know there is a chain link fence within a mile of you...you will be digging a TON of aluminum fence wire. On the AT Max, most of it will read 66, but depending on the size and shape of the wire, it can read anywhere from 60-70-ish. I usually dig any solid signal above 45, and sometimes anything over 40. I've found some interesting stuff by doing that. An Italian 925 necklace with the 925 cross still attached I found outside the playing area of a soccer field was a jumpy 45-48 signal. Almost didn't dig it, because that is almost always a smallish piece of can slaw.
None of the fields/complexes are over 30 years old or so. I've noticed that my city/county just **loves** putting fill dirt over everything. Somebody in charge of fill dirt probably has a family member in the fill dirt bidness. And people who do ground work apparently eat nothing but Vienna sausages and sardines, because I have dug those empty cans from 15" deep. But they really sound good! Now that I've been beeping about six months, in these fields/complexes, if I can't get a beep from my pinpointer after cutting a small plug, I figure that it is a deep piece of trash, cover it up, and move on.
And, finally, finding keeper stuff is about psychology and probability. If you go watch what happens during games--for baseball, soccer, football, whatever--the fields are large and there aren't that many players in a relatively large area. Outside of the playing area, there are almost always more people in a smaller, better defined area. And all of those people spectating have to be in certain places to spectate successfully. Find those places. And always concentrate on areas that funnel everybody through specific areas, like the outfield fences of side-by-side fields, where people are funneled to access the bleacher areas/concession areas.
Hope that helps some. And pardon the rambling. It was 54 when I got up down here in FL and I am waiting for it to warm up before I head out to beep some baseball fields...
