I don't ever remember hearing about anyone actually jamming something up someone's ass when I was in HS.
It's not uncommon, sadly.
I just did a Google search to confirm and quickly found a bunch of cases. This is just the tiniest tip of the iceberg. Like I said, broom handles are the most popular.
Case 1:
In 2013, Josh Villegas was a 14-year-old freshman on the Oak Hills High School football team in Hesperia, California, when he says he was attacked while using a urinal inside a locker room bathroom. Overpowered by teammates, Josh says he was pinned against a wall face-first while another teammate sodomized him with his fingers. No suspects were identified and the case resulted in no criminal charges. But in July 2014, Josh and his mother sued the school district, alleging that coaches and administrators allowed to exist a "long-lasting tradition of ritual hazing and sadomasochistic sexual beatings." School officials, who completed their own investigation in about two days, found no wrongdoing and deny those allegations.
Case 2:
In September 2011, at least two older teammates of Jordan Preavy, a junior on the Milton High School football team in Vermont, used a broom handle to sodomize the 16-year-old through his clothing as part of a hazing ritual. Witnesses told police that Jordan's head snapped back and he looked pained, yelling "No!" and "Get off!" Jordan never told his parents about the incident. Nearly a year later, on Aug. 28, 2012, just a few weeks after his 17th birthday, Jordan committed suicide. Milton school administrators first became aware in May 2013 that Jordan had been hazed, but they didn't report the incident to the proper authorities or notify Jordan's parents. It would be another year before police, while investigating other allegations of hazing on the Milton football team, discovered and finally informed the family about Jordan's hazing.
Case 3:
In 2005, 18-year-old D'Arcy McKeown was a high-profile incoming center for the McGill University football team in Montreal. Soon after he arrived, he started hearing degrading and violent threats from some veteran players, including ominous references to “Dr. Broom” and a bizarre hazing ritual. On an August night on a squash court, away from staff and coaches, D'Arcy was sodomized with a broom handle while teammates cheered from the bleachers above.
Case 4:
The text message from a Juanita High School football player to his freshman teammate was ominous. They were “gonna jubie” a student in the locker-room showers. The student, a volunteer manager with the football team, was being held on the shower floor by a group of 14- and 15-year-old players, his pants and underwear yanked down as he was jabbed at with a broomstick.
Case 5:
A month after hazing allegations came to light at a Chester County, Pennsylvania, high school, the district attorney announced charges against three football players accused of sodomizing a younger teammate with a broomstick. Older boys are accused of putting their genitals on younger boys' heads, and on Oct. 15, three 17-year-olds allegedly forced a broomstick into the anus of a younger, smaller boy. It happened after the younger player opted out of cleaning the locker room in his underwear, authorities said. When the boy tried to leave, an upperclassman told teammates, "stick a broom up his a--," according to Hogan.
Case 6:
Convicted N.M. High School Players Get Sued for Sodomizing Teammates. It was August 2008 when six football players at Robertson High School were accused of sexually assaulting younger players at a football camp. Now, seven teenagers who say they were sodomized with a broom handle have sued over the attacks.
Case 7:
Fernando Salgado was one of four students at A.B. Miller High School, in Fontana, Calif., arrested in the attempted sodomy of another student with steel rebar while the other three - all minors - allegedly held the boy down and removed his pants, reported KTLA. Another incident took place June 14 involving three students who allegedly held down another boy while Salgado attempted to sodomize him with a wooden broom handle, according to KTLA.
Case 8
Thorndale Texas High School
Four athletes accepted a guilty plea of Class B misdemeanor hazing in an incident where a plastic bottle was jammed in a younger player's anal cavity to initiate him as a junior varsity player.
Case 9
Lyndhurst New Jersey
At a football camp in Pennsylvania, one sophomore was allegedly forced to insert his finger into the anus of another sophomore while 20 to 30 other teammates looked on. Two upperclassmen were dismissed from the team, and two others were demoted on the squad as a result of a school inquiry into the matter. No coaches were disciplined.
Case 10
Sunnyside Washington High School
In the school’s wrestling room, a 15-year-old boy was allegedly sodomized with a mop handle while teammates held him down and dozens of other wrestlers watched. The attack sent the boy, bleeding and traumatized, to the hospital for a week. He suffered internal injuries.
Case 11
Alexander Ohio High School
Parents of the victims contended their sons were sodomized with shampoo bottles after football practice on separate nights and suffered from mental anguish and continued harassment in school.
Case 12
Canyon Texas High School
Nine players and the head coach were suspended for an alleged hazing incident involving coat hangers in the locker room. Two players were charged with misdemeanor assault for “knowingly and intentionally causing physical contact with another … that was offensive or provocative.”
Case 13
Prospect Ilinois High School
Two players testified in juvenile court that they rescued a teammate after he allegedly was sexually assaulted with a foreign object in the locker room.
Case 14
Rancho Bernardo California High School
Three players pleaded guilty to sodomizing a freshman teammate with a broom handle in a school locker room after a game. They served time in juvenile hall for the crime.
Case 15
Wallenberg High School California
Three players were arrested after a pool-side hazing turned into an alleged sexual assault on a team road trip. The San Francisco Examiner reported that “foreign objects,” possibly coat hangers, had been used to sexually assault the students.
Case 16
Yucca Valley High School California
One football player was found not guilty by the courts and five settled for a lesser sexual battery charge by admitting involvement in an incident where a younger player was penetrated with an object.
Case 17
Trumbull Connecticut High School
Police say the victim, a student with learning disabilities, was stuffed inside a locker, slammed into a wall and sodomized with a plastic knife handle in a series of attacks. The victim suffered a serious knee injury in one incident and is receiving counseling for emotional trauma. A team member also reportedly told police that both the wrestling and basketball coaches at the school saw the victim hog-tied and did nothing.
Case 18
Hilton Head South Carolina High School
The wrestling coach resigned and six players were suspended after a player complained of being sexually assaulted with a broomstick.
Case 19
Broadview Heights Ohio High School
As part of a hazing practice done to freshman and sophomores, two teens held down a 16-year-old while a third teen put one finger into the victim's anus.
Case 20
Mepham High School New York
Veteran football players penetrated three JV players with a broomstick, pine cones and golf balls during several attacks.
Case 21
Barnegat High School New Jersey
Hazing allegations involving molestation of a 14-year-old were reported after a party at a residence where a football team member was reportedly held down by other team members and sexually assaulted with a pool stick, according to the ABC-TV web site. Some team members used cell phones to photograph the alleged initiation.
Case 22
Winslow High School Arizona
Members of a girl’s athletic squad charged that they saw evidence of male athletes being sodomized with fingers and objects.