Starting this season, Major League Baseball has mandated that all parks update their security measures. Such a security measure is the installation of metal detectors at all gates and access points at Petco Park. This change was made to "strengthen and standardize security practices across the League"
Re: metal detectors, MLB had mandated that all stadiums install them by 2015.— Dennis Lin (@dennistlin) February 3, 2015
Bags will still be checked as you enter the ballpark, but before you walk through those metal detectors, take heed as to what you'll be allowed to have on you before you end up getting a follow-up search.
Obviously you need to not bring those other large metal objects likes knives, weapons, or metal drumsticks for your drum kit. If the detector beeps, you'll get the hand-held wand with a security follow-up if necessary.
If you have a stroller or wheelchair, you won't have to go through these walk through detectors, but you still will have to get screened a different way. This is all pretty standard stuff. Nothing special.
One of the more interesting parts of this announcement is that Petco Park did not change their bag policy. You can still bring in bags no larger than 16" x 16" x 8". And if you want to get into the park quicker, don't bring a bag so they won't have to check you.
Also part of this announcement are some changes being made to the parking situation downtown. Due to a loss of 500 parking spaces in Parcel C, the parking rates around the park will be increasing in 2015.
As you can see, Parcel C is located at the Home Plate Gate by the Ticket Office. For more detailed information on these changes, make sure to visit the Padres website. Parking is available for purchase beginning this Friday, February 6th, when Single Game Tickets go on sale at 9am.