The forward is expected to miss 3-5 weeks.
The Lions begin the first of two straight home matches against FC Cincinnati
The Lions ink their 8th overall pick to a first team contract.
The Lions will compete in their first regional tournament later this summer.
Rivera joins the MLS ranks after committing to play college soccer in December
The seventh MLS draft for the Lions saw them add depth across the backline and up top.
The club has inked the centerback to a new two-year contract with club options for another two years.
Tigres come from 1-0 down to win 2-1 thanks to a late goal from André-Pierre Gignac.
A wild night in Orlando saw Carlos Vela score two goals in 90 seconds, while André-Pierre Gignac scored a brace of penalties.
Both MLS sides saw their Champions League hopes flail out after tonight’s results.