Liverpool trailed 2-1 in the 71st minute at Anfield when striker David Ngog went down in the area after a challenge by Lee Carsley, although the Birmingham midfielder clearly made no contact.

Gerrard, having come off the bench despite a lingering groin injury, scored from the spot to keep his team in seventh spot in a horror season that also has Liverpool facing elimination from the group stage of the Champions League.

Liverpool has been beaten six times in its past nine matches in all competitions, drawing twice and winning only once.

The Reds have 19 points, while Birmingham is 15th with 12 points after a seventh straight league game against Liverpool without losing. Chelsea leads with 30 points, five ahead of Arsenal and Manchester United. Tottenham has 22, Aston Villa 21 and Man City 20.

Although Fernando Torres was missing with a groin injury, Benitez surprisingly selected Gerrard on the bench and then watched his side go ahead in the 13th minute through Ngog.

Glen Johnson set up the chance with a weaving run down the right. Goalkeeper Joe Hart blocked shots from Ngog and Dirk Kuyt, but Alberto Riera lobbed the ball back toward the Frenchman, who powered it into the roof of the net with a first-time volley.

Birmingham leveled from a free kick in the 26th. Headed passes by Roger Johnson and Liam Ridgewell set up Christian Benitez for an close-range header to score.

Liverpool lost Riera just before halftime with a recurrence of his hamstring trouble and Gerrard went on as his replacement. But the Liverpool captain had not touched the ball before his side fell behind to Cameron Jerome's amazing strike in first-half stoppage time.

The striker collected a headed clearance by teammate Scott Dann, shrugged off a challenge and fired a dipping 30-meter shot that flew past goalkeeper Pepe Reina and under the crossbar.

Gerrard almost made it 2-2 in the 63rd minute when his header hit the outside of the post after a cross from Johnson.

Still, the Liverpool captain equalized in contentious circumstances.

Ngog burst into the area from the left and went down under a challenge from Carsley, although it appeared clear from TV replays that no contact had been made. Referee Peter Walton awarded the spot kick and Gerrard sent Hart the wrong way.

Gerrard lobbed an 18-meter shot over the bar before Liverpool sent on Italian midfielder Alberto Aquilani for his home debut with eight minutes to go to no avail.