OWINGS MILLS — Ravens quarterback Lamar Jackson missed the first day of training camp because of an illness and was sent home, the team announced.

“[There are] really no details,” coach John Harbaugh said. “He just started getting sick yesterday. Midday, he was in the meetings, [he] started getting sick – it got kind of not good. He tried to get in today and get rest and then get fluids and things; it just wasn’t good. He was sent home by the doctors.”

Harbaugh could not provide a timeline for Jackson’s return to practice.

“It’s a sickness – when he feels better. [He’ll return] when he’s not sick anymore,” he said.

Josh Johnson ran the first-team offense and was backed up by rookies Emory Jones and Devin Leary.

Kyle Hamilton who missed time during the organized team activities with an elbow injury was back on the practice field. In addition, newly signed safety Eddie Jackson was also at practice for the first time.

Jackson is the reigning NFL MVP and had mixed attendance at the OTAs this spring. He looked sharp when he did practice.

Last season, Jackson threw for 3,678 yards and 24 touchdowns with career highs in completion percentage (67.2) and yards per completion (8) in 16 regular-season games. He also led the Ravens with 821 yards rushing, averaging 5.5 yards per carry and five scores.

His seven 50-yard rushing games give Jackson 54 in his career, tying Michael Vick’s all-time mark for quarterbacks. He also became the first quarterback to run for 700 or more yards in five consecutive seasons, He was named the AFC Offensive Player of the Week for Weeks 7 and 17.