David Carr lost the most games by a quarterback in his first 5 seasons, with 53 losses.

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what qb has the most losses in the first 5 seasons
Interpreted as:
What qb has the most regular-season losses in the first 5 seasons?
CarrBortlesBrunnerCarrHarringtonGeorgeManningSneadWinstonZornPastoriniTestaverdeTrullPlummerMoonDeBergTarkentonToddRoteTannehillCouchAdamsDavidson5350474646464545444444434342424242414140404040
NAMEGPLCMPATTPCTYDSAVGYDS/GTDTD%INTINT%SCKSCKYRATE
David CarrDavid Carr76531,2432,07060.013,3916.5176.2592.9653.12491,46675.5
Blake BortlesBlake Bortles75501,5612,63259.317,6466.7235.31033.9752.81951,15880.6
Scott BrunnerScott Brunner73475121,04648.96,4576.288.5292.8545.256.3
Derek CarrDerek Carr78461,7592,80062.818,7396.7240.21224.4541.914285888.8
Joey HarringtonJoey Harrington69461,2092,19055.212,4785.7180.8723.3773.59257868.1
Jeff GeorgeJeff George68461,1962,05658.213,2856.5195.4643.1643.11781,38574.9
Archie ManningArchie Manning63457491,49150.28,6995.8138.1473.2785.257.0
Norm SneadNorm Snead65458191,66349.212,5587.6193.2754.5965.865.6
Jameis WinstonJameis Winston72441,5632,54861.319,7377.7274.11214.7883.51691,07586.9
Jim ZornJim Zorn72441,1212,12652.714,5486.8202.1803.81044.966.7
Dan PastoriniDan Pastorini67447281,44850.38,5195.9127.1433.0765.256.5
Vinny TestaverdeVinny Testaverde62439201,80251.112,2666.8197.8633.5965.31621,29062.4
Don TrullDon Trull604324256143.13,5116.358.5274.8223.963.8
Jake PlummerJake Plummer68421,2562,22456.514,6506.6215.4723.2944.21791,07869.8
Warren MoonWarren Moon68421,0591,97753.614,6697.4215.7783.9854.31711,38772.9
Steve DeBergSteve DeBerg62428651,53256.59,4226.2152.0503.3775.064.7
Fran TarkentonFran Tarkenton70428321,54154.012,0187.8171.7966.2795.179.0
Richard ToddRichard Todd61416931,34751.49,5717.1156.9533.9916.859.5
Tobin RoteTobin Rote60415231,20443.47,3556.1122.6544.5857.149.3
Ryan TannehillRyan Tannehill77401,6532,63762.718,4557.0239.71064.0662.52131,60686.5
Tim CouchTim Couch62401,0251,71459.811,1316.5179.5643.7673.91661,11975.1
Tony AdamsTony Adams534021240852.02,7336.751.6122.9276.655.5
Cotton DavidsonCotton Davidson66404771,09643.57,2056.6109.2393.6686.251.8
Lamar McHanLamar McHan60404331,01242.86,5786.5109.6504.9777.649.6
Babe ParilliBabe Parilli554029266144.23,9796.072.3263.9629.438.0